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عبد الحميد محمد اجبار

أستاذ

عضو هيئة تدريس

كلية الهندسة
مبنى 3 الدور الثاني رقم المكتب 2ب43

4676843
aajbar

نبذة تعريفية / مختصر السيرة الذاتية

  1.   Abdelhamid Ajbar
  2. Text Box: PERSONAL DATA

  3.  
  4.  
  5.   Name:  AbdelHamid Ajbar 
  6.   Position: Professor of Chemical Engineering
  7.   Address: Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi  Arabia.
  8.   Email: aajbar@ksu.edu.sa
  9.   Languages proficiencies: Arabic, English, French

  10.    
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  12. Doctorate in Chemical Engineering, (Ph.D), University of Notre Dame, USA, 1994.

            Dissertation Title:" Robust Control and Monitoring of Discrete Time Feedback Control Systems".

            Advisor: J.C. Kantor

  13. Trained at Shell Oil Company, West Hollow Research Center, Houston, USA, May-Sept. 1992. 
  14. Master of Science in Chemical Engineering University of Notre Dame, USA, 1991.
  15. Ingenieur D'Etat in Chemical Engineering, Ecole Nationale De L'Industrie Minerale (ENIM), Rabat, Morocco,1988
  16. 2009 - Present: Professor, Department of Chemical Engineering, King Saud University
  17.  
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  20.  
  21. A. Ajbar and K. Alhumaizi, Dynamics of the Chemostat: A Bifurcation Theory Approach, Taylor and Francis, CRC Press, 2011.
  22. A. Ajbar, E. Ali, and K. Alhumaizi, An Introduction to Modelling of Chemical Processes, KSU Press, 2010.
  23. E. Ali, A. Ajbar, and K. Alhumaizi, An Introduction to Numerical Methods in Chemical Engineering, KSU Press, 2009.
  24. Arabic translation of  Writing and Using Learning Outcomes: A Practical Guide  by Dr. Declan Kennedy, UCC, 2007.
  25. سعيد الزهراني وعبد الحميد أجبار (صياغة مخرجات التعلم واستخدامها: دليل تطبيقي)، وزارة التعليم العالي 2013
  26. Arabic translation of Science and Corporate Strategy by D. Hounshell and J. K. Smith Jr., Cambridge University Press, 1988.
  27.        سعيد الزهراني وعبد الحميد أجبار (العلم واستراتيجيات الشركات: الأبحاث والتطوير في دي بونت 1920–1980)، 2019
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  31. Certificate of appreciation by the deanship of scientific research in KSU for publishing in top 10% journals (twice in 2025).
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  38. Coordinator of the Accreditation and Quality Unit, Department of Chemical Engineering (2015–Present)
  39. Head of Alumni Unit, Vice Deanship of Quality and Development, College of Engineering, King Saud University (2019–2023)
  40. Head of Development Unit, Vice Deanship of Quality and Development, College of Engineering, King Saud University (2015–2018)
  41. Member of the Committee for the Development of the Strategic Plan for the College of Engineering at King Saud University (2011–2016)
  42.  
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  44.  
  45. Served as a member of committees for the (Saudi) National Center for Academic Accreditation and Evaluation (NCAAA) to review the accreditation of a number of university institutions (undergraduate and graduate) in 2024, 2025, and 2026.
  46. Served as a member to review the accreditation of a university for the Education and Training Quality Authority of Bahrain, 2020.
  47. Served as a member of the committee for the development of exams for professional engineers in Saudi Arabia, National Center of Assessment (QIYAS), Ministry of Higher Education (2017–2018).
  48. Served as a member of the committee for developing qualifying exit exams for engineering graduates from Saudi universities, National Center of Assessment (QIYAS), Ministry of Higher Education (2013–2015).
  49. Served as a member of the engineering research team to develop an academic framework for engineering education, National Center of Assessment (QIYAS), Ministry of Higher Education (2012–2013).
  50. Member of the Committee for the feasibility study of the establishment of a distinguished college (College X) at King Saud University (2009–2010).
  51.  

  52.  
  53. 2006-2010: A. Ajbar (with I. Almutaz, E. Ali, H. AlSheikh), "Long Term Demand for Desalinated Water in the Kingdom", funded by Ministry of Water and Electricity
  54. 2007-2009: A. Ajbar (with I. Almutaz and A. Almutlaq), "Wastewater management in Kingdom Oil Refineries", funded by King Abdulaziz City for Science and Technology.
  55. 2008-2010: A. Ajbar (with M. Asif and Y. Bakhbakhi), “Improvement of Fluidization of Nanoparticles”, funded by King Abdulaziz City for Science and Technology.
  56. 2009-2010: A. Ajbar (with K. Alhumaizi), “Optimization of Energy Use in Steel Plants”, funded by National Strategy for Science and Technology.
  57. 2012-2013: Development of A Framework for Assessing Learning Outcomes in Engineering Education (with S. Zahrani et al.), funded by National Center of Assessment (QIYAS), Ministry of Higher Education
  58. 2013-2015: Development of Exit Engineering Exams, (with S. Zahrani et al.), funded by National Center of Assessment (QIYAS), Ministry of Higher Education
  59. 2015-2017: Reduction of Post Combustion Carbon Dioxide by Adsorption in Fluidized Beds, A. Ajbar (with M. Asif), King Abdulaziz City for Science and Technology (KACST)
  60. 2017-2018 Development of  Professional Engineering Exams, (with S. Zahrani et al.), funded by National Center of Assessment (QIYAS), Ministry of Higher Education

  61. 2022-2023:  Novel design of a solar-based cogeneration system for the simultaneous cooling and fresh water production under arid climate, (with E. Ali) funded by Research & Innovation, Ministry of Education             


     

  62.  
  63. Mathematical modelling and analysis of chemical and biochemical processes
  64. Energy systems and thermal engineering
  65. Artificial Intelligence and Engineering Education
  66.  

  67. 2026
  68. 1. Alqahtani, R. T., Ajbar, A., & Sarikaya, M. Z. (2026). Gompertz Growth in Tumor-Immune Competition: Bifurcations, Multistability, and Chemotherapeutic Implications. *Mathematics*, 14(3), 491.
  69. 2. Ajbar, A. and E. Ali, Engineering Students' Perceptions of Artificial Intelligence: A Case Study from Saudi Arabia, *International Journal of Engineering Education*, 42(1), 213–228.
  70.  
  71. 2025
  72. 3. Alqahtani, R. T., Chrafih, Y., & Ajbar, A. (2025). Next-gen solar: revealing the promise of CsPbI₃/CsSnI₃ tandem cells. *Solar Energy*, 298, 113665.
  73. 4. Lamrani, B., Alqahtani, R. T., & Ajbar, A. (2025). Dynamic performance analysis of sensible and latent cold thermal energy storage systems for building cooling networks. *Case Studies in Thermal Engineering*, 71, 106264.
  74. 5. Ajbar, A., Alqahtani, R. T., & Alhumaizi, K. (2025). Bifurcation study of a tumor-immune system with chemotherapy. *PLoS One*, 20(7), e0327304.
  75. 6. Lamrani, B., Alqahtani, R. T., Ajbar, A., & Kousksou, T. (2025). Resistance-capacitance dynamic model for hydrogen storage in metal hydrides with phase change material as thermal management system. *Energy Conversion and Management: X*, 26, 101007.
  76. 7. Benaicha, M., Alqahtani, R. T., Lamrani, B., & Ajbar, A. (2025). Prediction of rheological behavior in self-compacting concrete incorporating mineral admixtures using neural network models. *Advanced Powder Technology*, 36(10), 105026.
  77. 8. Ajbar, A., & Alqahtani, R. T. (2025). Dynamics of a Symmetric Model of Competition Between Tumor and Immune Cells Under Chemotherapy. *Symmetry*, 17(4), 492.
  78. 9. Alqahtani, R. T., Ajbar, A., & Aljebli, E. H. (2025). Dynamics of a Model of Tumor–Immune Cell Interactions Under Chemotherapy. *Mathematics*, 13(13), 2200.
  79. 10. Alqahtani, R. T., Ajbar, A., & Alqhtani, M. (2025). Dynamics of a Symmetric Seasonal Influenza Model with Variable Recovery, Treatment, and Fear Effects. *Symmetry*, 17(6), 803.
  80. 11. Chrafih, Y., Alqahtani, R. T., Ajbar, A., & Lamrani, B. (2025). Multi-Scale Modeling of Doped Magnesium Hydride Nanomaterials for Hydrogen Storage Applications. *Nanomaterials*, 15(19), 1470.
  81. 12. Gouztal, O., Alqahtani, R. T., Chrafih, Y., & Ajbar, A. (2025). 29% efficiency of novel monolithic 2-terminal kesterite Cs₂AgBiBr₆/Ag₂BeSnTe₄ tandem solar cell. *Journal of Physics and Chemistry of Solids*, 205, 112774.
  82.  
  83.  
  84. 2024
  85. 13. Ali, E., Ajbar, A., & Lamrani, B. (2024). Numerical Investigation of Thermal Energy Storage Systems for Collective Heating of Buildings. *Buildings*, 14(1), 141.
  86. 14. Alqahtani, R. T., Ajbar, A., & Alharthi, N. H. (2024). Dynamics of a Model of Coronavirus Disease with Fear Effect, Treatment Function, and Variable Recovery Rate. *Mathematics*, 12(11), 1678.
  87.  
  88. 2023
  89. 15. Ajbar, A., Lamrani, B., & Ali, E. (2023). Dynamic Investigation of a Coupled Parabolic Trough Collector–Phase Change Material Tank for Solar Cooling Process in Arid Climates. *Energies*, 16(10), 4235.
  90. 16. Ali, E., Ajbar, A., & Lamrani, B. (2023). Modeling and Dynamic Simulation of a Phase-Change Material Tank for Powering Chiller Generators in District Cooling Networks. *Sustainability*, 15(13), 10332.
  91. 17. Asif, M. E. Ali and A. Ajbar, On the existence of chaotic behavior in pure and simple microbial competition: The role of Contois kinetics, *ANZIAM J.*, Vol. 55, 162–174 (2013). *(Note: This entry appears misplaced under 2023 in the original; it belongs to 2013.)*
  92. 18. Ali, E. and A. Ajbar, Enhanced operation of a wastewater treatment process by periodic forcing input, *Journal of Saudi Chemical Society*, Vol. 17, 345 (2013).
  93. 19. Ali, E., M. Asif and A. Ajbar, Study of chaotic behavior in predator-prey interactions in a chemostat, *Ecological Modeling*, Vol. 259, 10–15 (2013).
  94. 20. Saharf, M. A. Alsadaawi, M. Elmadany, S. Al-Zahrani and A. Ajbar, Identification of top competencies required from engineering graduates: a case study of Saudi Arabia, *International Journal of Engineering Education*, Vol. 29, 967 (2013).
  95. 21. Al-Haj Ali, M.A. Ajbar, Emad Ali, K. Alhumaizi, Optimization-based periodic forcing of RO desalination process for improved performance, *Desalination and Water Treatment*, Vol. 51, 6961–6969 (2013).
  96. 22. Almutaz, I., Ali, E. Khalid, Y. and A. Ajbar, A long-term forecast of water demand for a desalinated dependent city: case of Riyadh City in Saudi Arabia, *Desalination and Water Treatment*, Vol. 51, 5934–5941 (2013).
  97. 23. Ali, E., Alnashef, A., A. Ajbar, S. Mulyono, H. Hizaddin, M. Hadj-Kali, Determination of cost-effective operating condition for CO₂ capturing using 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid, *Korean Journal of Chemical Engineering*, Vol. 30, 2068–2077 (2013).
  98. 24. Bakhbakhi, Y., M. Asif, A. Chafidz, A. Ajbar, Formation of biodegradable polymeric fine particles by supercritical antisolvent precipitation process, *Polymer Engineering and Science*, Vol. 53, 564–570 (2013).
  99. 25. Bakhbakhi, Y., Alfadul, S., A. Ajbar, Precipitation of Ibuprofen Sodium using compressed carbon dioxide as antisolvent, *European Journal of Pharmaceutical Sciences*, Vol. 48, 30–39 (2013).
  100. 26. Bakhbakhi, Y., M. Asif, A. Chafidz and A. Ajbar, Supercritical antisolvent synthesis of fine griseofulvin particles, *Advanced Powder Technology*, Vol. 24, 1006–1012 (2013).
  101. 27. Ali, E. A. Ajbar and K. Alhumaizi, Enhanced Ethanol Reactor Operation Through Periodic Forcing of the Feed Rate, *Arabian Journal for Science and Engineering*, Vol. 38, 741–750 (2013).
  102.  
  103. 2022
  104. 28. Al-Rabiah, A. A., Al-Dawsari, J. N., Ajbar, A. M., Al Darwish, R. K., & Abdelaziz, O. Y. (2022). Development of a Biomass Gasification Process for the Coproduction of Methanol and Power from Red Sea Microalgae. *Energies*, 15(21), 7890.
  105.  
  106. 29. Ajbar, A., Alqahtani, R. T., & Musa, S. S. (2022). Static and dynamic analysis of a continuous bioreactor model for the production of biofuel from refinery wastewater using *Rhodococcus opacus*. *Mathematics*, 10(16), 2842.
  107. 30. Ajbar, A. Study of complex dynamics in pure and simple microbial competition, *Chem. Eng. Sci.*, Vol. 80, 188–194 (2012).
  108. 31. Ali, E. A. Ajbar, K. Alhumaizi, Dynamics of recombinant DNA cultures under time varying feed conditions, *Chem. Eng. Commun.*, Vol. 199, 1155–1168 (2012).
  109. 32. Almutaz, I., A. Ajbar, M. Khalid, E. Ali, A probabilistic forecast of water demand for a tourist and desalination dependent city: Case of Mecca, Saudi Arabia, *Desalination*, Vol. 294, 53 (2012).
  110. 33. Alhuaizi, K., A. Ajbar, M. Soliman, Modeling the complex interactions between reformer and reduction furnace in a Midrex-based iron plant, *Can. J. Chem. Eng.*, Vol. 90, 1120–1141 (2012).
  111. 34. Ali, E., A. Ajbar and I. Almutaz, Periodic control of a reverse osmosis desalination process, *J. Proc. Contr.*, Vol. 22, 218–227 (2012).
  112. 2021
  113. 35. Lamrani, B., Kuznik, F., Ajbar, A., & Boumaza, M. (2021). Energy analysis and economic feasibility of wood dryers integrated with heat recovery unit and solar air heaters in cold and hot climates. *Energy*, 228, 120598.
  114. 36. Alqahtani, R. T., Ajbar, A., Bhowmik, S. K., & Alghamdi, R. A. (2021). Study of Static and Dynamic Behavior of a Membrane Reactor for Hydrogen Production. *Processes*, 9(12), 2275.
  115. 37. Alqahtani, R. T., Bhowmik, S. K., Ajbar, A., & Boumaza, M. (2021). Stability and performance analysis of bioethanol production with delay and growth inhibition in a continuous bioreactor with recycle. *Processes*, 9(3), 461.
  116. 38. Alqahtani, R. T., & Ajbar, A. (2021). Study of dynamics of a COVID-19 model for Saudi Arabia with vaccination rate, saturated treatment function and saturated incidence rate. *Mathematics*, 9(23), 3134.
  117. 39. Ajbar, A., Alqahtani, R. T., & Boumaza, M. (2021). Dynamics of an SIR-based COVID-19 model with linear incidence rate, nonlinear removal rate, and public awareness. *Frontiers in Physics*, 9, 634251.
  118. 40. Ajbar, A., Alqahtani, R. T., & Boumaza, M. (2021). Dynamics of a COVID-19 model with a nonlinear incidence rate, quarantine, media effects, and number of hospital beds. *Symmetry*, 13(6), 947.
  119. 41. Ajbar, A. Study of the Operability of Nonideal Continuous Bioreactors, *Chemical Engineering Communications*, Vol. 198, 385–415 (2011).
  120. 42. Ajbar, A. K. Alhumaizi and M. Soliman, Modeling and simulations of a reformer used in direct reduction of iron, *Korean Journal of Chemical Engineering*, Vol. 28, 2242 (2011).
  121. 43. Bakhbakhi, Y., Alfadul, S. M., Chafidz, A., Ajbar, A., Synthesis of Fine Pharmaceutical Particles by a Gaseous Antisolvent Mechanism, *Nanotechnology*, Vol. 2, 501–504 (2011).
  122. 44. Ajbar, A. Bakhbakhi, Y. Ali, S. Asif, M. Fluidization of nano-powders: Effect of sound vibration and pre-mixing with group A particles, *Powder Technology*, Vol. 206, 327–337 (2011).
  123. 45. Al-Haj, M., Ajbar, A., Ali, E., Alhumaizi, K., Study of Cyclic Operation of RO Desalination Plants, *Can. J. of Chemical Engng.*, Vol. 89, 299–303 (2011).
  124. 46. Ajbar, A., Alhumaizi, K., Soliman, M. Modelling and parametric studies of direct reduction reactor, *Ironmaking & Steelmaking*, Vol. 38, 401–411 (2011).
  125. 47. Ajbar, A., AlAhmad, M. and Ali, E. On the dynamics of biodegradation of wastewater in aerated continuous bioreactors, *Mathematical and Computer Modelling*, Vol. 54, 1930 (2011).
  126. 48. Ajbar, A. On the improvement of performance of bioreactors through periodic forcing, *Computers & Chemical Engineering*, Vol. 35, 1164–1170 (2011).
  127.  
  128. 2020
  129. 49. Asif, M., Al-Ghurabi, E. H., Ajbar, A., & Kumar, N. S. (2020). Hydrodynamics of pulsed fluidized bed of ultrafine powder: fully collapsing fluidized bed. *Processes*, 8(7), 807.
  130. 50. Ajbar, A., & Alqahtani, R. T. (2020). Bifurcation analysis of a SEIR epidemic system with governmental action and individual reaction. *Advances in Difference Equations*, 2020(1), 541.
  131. 51. Al-Haj, M., Ajbar, A. Ali, E., Alhumaizi, K. Control of molecular weight distribution of polyethylene in gas-phase fluidized bed reactors, *Korean Journal of Chemical Engineering*, Vol. 27, 364–372 (2010).
  132. 52. Ali, M.A, Ajbar, A, Ali, A. K. Alhumaizi, Robust model-based control of a tubular reverse-osmosis desalination unit, *Desalination*, Vol. 255, 129–136 (2010).
  133.  
  134. 2013
  135. 53. Asif, M. E. Ali and A. Ajbar, On the existence of chaotic behavior in pure and simple microbial competition: The role of Contois kinetics, *ANZIAM J.*, Vol. 55, 162–174 (2013).
  136. 54. Ali, E. and A. Ajbar, Enhanced operation of a wastewater treatment process by periodic forcing input, *Journal of Saudi Chemical Society*, Vol. 17, 345 (2013).
  137. 55. Ali, E., M. Asif and A. Ajbar, Study of chaotic behavior in predator-prey interactions in a chemostat, *Ecological Modeling*, Vol. 259, 10–15 (2013).
  138. 56. Saharf, M. A. Alsadaawi, M. Elmadany, S. Al-Zahrani and A. Ajbar, Identification of top competencies required from engineering graduates: a case study of Saudi Arabia, *International Journal of Engineering Education*, Vol. 29, 967 (2013).
  139. 57. Al-Haj Ali, M.A. Ajbar, Emad Ali, K. Alhumaizi, Optimization-based periodic forcing of RO desalination process for improved performance, *Desalination and Water Treatment*, Vol. 51, 6961–6969 (2013).
  140. 58. Almutaz, I., Ali, E. Khalid, Y. and A. Ajbar, A long-term forecast of water demand for a desalinated dependent city: case of Riyadh City in Saudi Arabia, *Desalination and Water Treatment*, Vol. 51, 5934–5941 (2013).
  141. 59. Ali, E., Alnashef, A., A. Ajbar, S. Mulyono, H. Hizaddin, M. Hadj-Kali, Determination of cost-effective operating condition for CO₂ capturing using 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid, *Korean Journal of Chemical Engineering*, Vol. 30, 2068–2077 (2013).
  142. 60. Bakhbakhi, Y., M. Asif, A. Chafidz, A. Ajbar, Formation of biodegradable polymeric fine particles by supercritical antisolvent precipitation process, *Polymer Engineering and Science*, Vol. 53, 564–570 (2013).
  143. 61. Bakhbakhi, Y., Alfadul, S., A. Ajbar, Precipitation of Ibuprofen Sodium using compressed carbon dioxide as antisolvent, *European Journal of Pharmaceutical Sciences*, Vol. 48, 30–39 (2013).
  144. 62. Bakhbakhi, Y., M. Asif, A. Chafidz and A. Ajbar, Supercritical antisolvent synthesis of fine griseofulvin particles, *Advanced Powder Technology*, Vol. 24, 1006–1012 (2013).
  145. 63. Ali, E. A. Ajbar and K. Alhumaizi, Enhanced Ethanol Reactor Operation Through Periodic Forcing of the Feed Rate, *Arabian Journal for Science and Engineering*, Vol. 38, 741–750 (2013).
  146.  
  147. 2012
  148. 64. Ajbar, A. Study of complex dynamics in pure and simple microbial competition, *Chem. Eng. Sci.*, Vol. 80, 188–194 (2012).
  149. 65. Ali, E. A. Ajbar, K. Alhumaizi, Dynamics of recombinant DNA cultures under time varying feed conditions, *Chem. Eng. Commun.*, Vol. 199, 1155–1168 (2012).
  150. 66. Almutaz, I., A. Ajbar, M. Khalid, E. Ali, A probabilistic forecast of water demand for a tourist and desalination dependent city: Case of Mecca, Saudi Arabia, *Desalination*, Vol. 294, 53 (2012).
  151. 67. Alhuaizi, K., A. Ajbar, M. Soliman, Modeling the complex interactions between reformer and reduction furnace in a Midrex-based iron plant, *Can. J. Chem. Eng.*, Vol. 90, 1120–1141 (2012).
  152. 68. Ali, E., A. Ajbar and I. Almutaz, Periodic control of a reverse osmosis desalination process, *J. Proc. Contr.*, Vol. 22, 218–227 (2012).
  153.  
  154. 2011
  155. 69. Ajbar, A. Study of the Operability of Nonideal Continuous Bioreactors, *Chemical Engineering Communications*, Vol. 198, 385–415 (2011).
  156. 70. Ajbar, A. K. Alhumaizi and M. Soliman, Modeling and simulations of a reformer used in direct reduction of iron, *Korean Journal of Chemical Engineering*, Vol. 28, 2242 (2011).
  157. 71. Bakhbakhi, Y., Alfadul, S. M., Chafidz, A., Ajbar, A., Synthesis of Fine Pharmaceutical Particles by a Gaseous Antisolvent Mechanism, *Nanotechnology*, Vol. 2, 501–504 (2011).
  158. 72. Ajbar, A. Bakhbakhi, Y. Ali, S. Asif, M. Fluidization of nano-powders: Effect of sound vibration and pre-mixing with group A particles, *Powder Technology*, Vol. 206, 327–337 (2011).
  159. 73. Al-Haj, M., Ajbar, A., Ali, E., Alhumaizi, K., Study of Cyclic Operation of RO Desalination Plants, *Can. J. of Chemical Engng.*, Vol. 89, 299–303 (2011).
  160. 74. Ajbar, A., Alhumaizi, K., Soliman, M. Modelling and parametric studies of direct reduction reactor, *Ironmaking & Steelmaking*, Vol. 38, 401–411 (2011).
  161. 75. Ajbar, A., AlAhmad, M. and Ali, E. On the dynamics of biodegradation of wastewater in aerated continuous bioreactors, *Mathematical and Computer Modelling*, Vol. 54, 1930 (2011).
  162. 76. Ajbar, A. On the improvement of performance of bioreactors through periodic forcing, *Computers & Chemical Engineering*, Vol. 35, 1164–1170 (2011).
  163.  
  164. 2010
  165. 77. Al-Haj, M., Ajbar, A. Ali, E., Alhumaizi, K. Control of molecular weight distribution of polyethylene in gas-phase fluidized bed reactors, *Korean Journal of Chemical Engineering*, Vol. 27, 364–372 (2010).
  166. 78. Ali, M.A, Ajbar, A, Ali, A. K. Alhumaizi, Robust model-based control of a tubular reverse-osmosis desalination unit, *Desalination*, Vol. 255, 129–136 (2010).
  167.  
  168. 2009
  169. 79. AlMubaddal, F. K. AlRumaihi, A. Ajbar, Performance optimization of coagulation/flocculation in the treatment of wastewater from a polyvinyl chloride plant, *Journal of Hazardous Materials*, Vol. 161, 431 (2009).
  170. 80. Ajbar, A., Al-Masry, W. and Ali, E. Prediction of flow regimes transitions in bubble columns using passive acoustic measurements, *Chemical Engineering and Processing – Process Intensification*, Vol. 48, 101–110 (2009).
  171. 81. Al-haj Ali, M., A. Ajbar, E. Ali, K. Alhumaizi, Modeling the transient behavior of an experimental reverse osmosis tubular membrane, *Desalination*, Vol. 245, 194–204 (2009).
  172.  
  173. 2008
  174. 82. Al-Rabiah and A. Ajbar, Study of the Operability of a Continuous Bioreactor for the pre-Fermentation of Cheese, *Engineering in Life Sciences*, Vol. 8, 157–166 (2008).
  175.  
  176.  
  177. 2006
  178.  
  179. 83. Alhumaizi, K., A. Alwan, and A. Ajbar, Competition of plasmid-bearing and plasmid-free organisms in a chemostat: A study of bifurcation phenomena, *Mathematical and Computer Modelling*, Vol. 44, 342 (2006).
  180. 84. Alhumaizi, K. and A. Ajbar, Optimization of An Unstructured First-Order Kinetic Model of Cyclically Operated Bioreactors, *Journal of Environmental Engineering*, Vol. 132, 453 (2006).
  181. 85. Alhumaizi, K., E. Ali and A. Ajbar, Study of Some Unique Features of Ratio-Dependent Models for Predator-Prey-Substrate Interactions In Continuous Cultures, *Chemical Engineering Communications*, Vol. 193, 1164 (2006).
  182.  
  183. 2005
  184. 86. Alhumaizi, K. and A. Ajbar, Dynamics of Predator-Prey Interactions in Continuous Cultures, *Engineering in Life Sciences*, Vol. 5, 139 (2005).
  185. 87. Ajbar, A. Alhumazi, K. Asif, M. Improvement of the fluidizability of cohesive powders through mixing with small proportions of group A particles, *Canadian Journal of Chemical Engineering*, Vol. 83, 930–943 (2005).
  186.  
  187. 2003
  188. 88. Ali, E., Alhumaizi, K. and Ajbar, Multivariable control of a simulated industrial gas-phase polyethylene reactor, *Industrial & Engineering Chemistry Research*, Vol. 42, 2349–2364 (2003).
  189.  
  190. 2002
  191. 89. Ajbar, A. and A.H. Fakeeha, Static and dynamic behavior of a class of unstructured models of continuous bioreactors with growth associated product, *Bioprocess and Biosystems Engineering*, Vol. 25, 21 (2002).
  192. 90. Ajbar, A. Alhumaizi, K. Ibrahim, A. Asif, M. Hydrodynamics of gas fluidized beds with mixture of group D and B particles, *Canadian Journal of Chemical Engineering*, Vol. 80, 281–288 (2002).
  193. 91. Ajbar, A. Classification of Static and Dynamic Behavior in Chemostat for Plasmid-Bearing, Plasmid Free Mixed Recombinant Cultures, *Chemical Engineering Communications*, Vol. 189, 1130 (2002).
  194.  
  195. 2001
  196. 92. Ajbar, A., Alhumaizi, K., Elnashaie, SSEH, Classification of static and dynamic behavior in a fluidized-bed catalytic reactor, *Chemical Engineering Journal*, Vol. 84, 503–516 (2001).
  197. 93. Ajbar, A. Classification of stability behavior of bioreactors with wall attachment and substrate-inhibited kinetics, *Biotechnology and Bioengineering*, Vol. 72, 166 (2001).
  198. 94. Ajbar, A. Classification of Static behavior of A Class of Unstructured Models of Continuous Bioprocesses, *Biotechnology Progress*, Vol. 17, 597 (2001).
  199. 95. Ajbar, A. Stability Analysis of the Biodegradation of Mixed Wastes In A Continuous Bioreactor with Cell recycle, *Water Research*, Vol. 35, 1201 (2001).
  200. 96. Ajbar, A. Operability of continuous bioprocesses: Static behavior of a large class of unstructured models, *Chemical Engineering Technology*, Vol. 24, 187–196 (2001).
  201. 97. Ajbar, A. Periodic behaviour of a class of unstructured kinetic models for continuous bioreactors, *Canadian Journal of Chemical Engineering*, Vol. 79, 791–799 (2001).
  202. 98. Ajbar, A. Stabilization of chaotic behavior in a two-phase autocatalytic reactor, *Chaos, Solitons and Fractals*, Vol. 12, 903–918 (2001).
  203.  
  204. 99. Ajbar, A. On the existence of oscillatory behavior in unstructured models of bioreactors, *Chemical Engineering Science*, Vol. 56, 1991 (2001).
  205. 100. Ajbar, A. Stability analysis of the biodegradation of mixed wastes in a continuous bioreactor with cell recycle, *Water Research*, Vol. 35, 1201–1208 (2001).
  206. 101. Ajbar, A. and Alhumaizi K., Gas phase polyethylene reactors - A global study of stability behavior, *Chemical Engineering Research & Design*, Vol. 79, 195–208 (2001).
  207. 102. Ajbar, Classification of stability behavior of bioreactors with wall attachment and substrate-inhibited kinetics, *Biotechnology and Bioengineering*, Vol. 72, 166–176 (2001).
  208.  
  209. 2000
  210. 103. Ajbar, A. and K. Alhumaizi, Biodegradation of Substitutable Substrates in a Continuous Bioreactor with Cell Recycle: A Study of Static Bifurcation, *Mathematical and Computer Modelling*, Vol. 31, 159 (2000).
  211. 104. Alhusseini, A. and Ajbar, A. Mass transfer in supported liquid membranes: A rigorous model, *Mathematical and Computer Modelling*, Vol. 32, 465–480 (2000).
  212. 105. Ajbar, A. and K. Alhumaizi, Microbial Competition: Study of Global Branching Phenomena, *AIChE J.*, 46, 322 (2000).
  213.  
  214. 1999
  215. 106. Alhumaizi, K. and A. Ajbar, Model reduction and robust control of multi-stage flash (MSF) desalination plants, *Desalination*, Vol. 121, 65–85 (1999).
  216.  
  217. 1997
  218. 107. Ajbar, A. Stability and Bifurcation of an Unstructured Model of a Bioreactor with Cell Recycle, *Mathematical and Computer Modelling*, Vol. 25, 31 (1997).
  219. 108. Ajbar, A. and G. Ibrahim, Periodic and Nonperiodic Oscillatory Behavior in a Model for Activated Sludge Reactors, *Mathematical and Computer Modelling*, Vol. 25, 9 (1997).
  220. 109. Ali, E., A. Ajbar and K. Alhumaizi, Robust control of industrial multi-stage flash desalination plants, *Desalination*, Vol. 114, 289–302 (1997).
  221.  
  222. 1996
  223. 110. Elnashaie, SSEH and A. Ajbar, Chaotic, non-chaotic strange attractors and bistability in non-isothermal fluidized bed catalytic reactors under PI control, *Chaos, Solitons and Fractals*, Vol. 7, 1955–1967 (1996).
  224. 111. Elnashaie, SSEH and A. Ajbar, Period-adding and chaos in fluidized bed catalytic reactors, *Chaos, Solitons and Fractals*, Vol. 7, 1317–1331 (1996).
  225.  
  226. 1995
  227. 112. Ajbar, H., Keenan, M.R., and Kantor, J.C., Optimal Linear Regulation with Hard Constraints, *AIChE J.*, Vol. 41, 2439–2450 (1995).
  228.  
  229.  

المنشورات
المزيد ...

publications
Dynamics of recombinant DNA cultures under time varying feed conditions, Chem. Eng. Commun. 199: 1155-1168 (2012
publications
Study of complex dynamics in pure and simple microbial competition, Chem. Eng. Sci. 80:188-194 (2012
publications
Modeling the complex interactions between reformer and reduction furnace in a Midrex-based iron plant, Can. J. Chem. Eng. 90: 1120-1141 (2012). Periodic control of a reverse osmosis desalination process, J. Proc. Contr. 22: 218-227 (2012

المواد الدراسية
المزيد ...

course
Introduction to Engineering Design - GE105

. In addition to exposing students to the engineering profession and to its different categories available in the college, this course aims at introducing the systematic engineering…

course
Computer Programming - GE 209

To introduce computer programming for solving engineering problems in MATLAB environment