Dr. Essam Roshdy El-Zahar
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Dr. Essam Roshdy El-Zahar

Assistant Professor
Salman Bin Abdulaziz University, Saudi Arabia

Highest Degree
Ph.D. in Engineering Mathematics from Menoufia University, Menofia Governorate, Egypt

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Biography

Dr. Essam Roshdy El-Zahar is currently working as Associate Professor of Mathematics Department, College of Science and Humanities, Salman Bin Abdulaziz University, Alkharj, Saudi Arabia. He earned his Ph.D. in Engineering Mathematics from Menofiya University, Egypt. Previously he was appointed as Demonstrator, Lecturer, and Assistant Professor at Department of Basic Engineering Science, Faculty of Engineering, Shebin El-Kom, Menofia University, Egypt. His main area of research interest focuses on Numerical Analysis and Computer Applications, Differential Equations, Computational Mathematics, and Engineering systems. He has received Award of scientific publications of Menofia University. He is member of Egyptian Society of Mathematics, and Syndicate of Egyptian Engineers. He has 21 publications in journals and 1 book contributed as author/co-author. He is also serving as reviewer for Applied Mathematics and Computation, Journal of Computational and Applied Mathematics, Journal of Modern Methods in Numerical Mathematics, International Journal of Physical Sciences, and Computers and Mathematics with Applications.

Area of Interest:

Mathematics
100%
Numerical Analysis
62%
Differential Equations
90%
Computational Mathematics
75%
Mathematical Engineering
55%

Research Publications in Numbers

Books
0
Chapters
0
Articles
37
Abstracts
3

Selected Publications

  1. Salah, B., E.R. El-Zahar, A.F. Aljohani, A. Ebaid and M. Krid, 2019. Optical soliton solutions of the time-fractional perturbed Fokas-Lenells equation: Riemann-Liouville fractionalderivative. Optik, 183: 1114-1119.
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  2. Khaled, S.M., E.R. El-Zahar and A. Ebaid, 2019. Solution of Ambartsumian delay differential equation with conformable derivative. Mathematics, Vol. 7. 10.3390/math7050425.
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  3. Habib, H.M., A.M. Ebady and E.R. El-Zahar, 2019. A numerical modeling of heat and mass transfer for a falling film absorber. Int. J. Eng. Res. Technol., 12: 287-295.
  4. El-Zahar, E.R. and H. Demiray, 2019. Analytical solutions of cylindrical and spherical dust ion-acoustic solitary waves. Results Phys., Vol. 13. 10.1016/j.rinp.2019.02.090.
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  5. El-Kabeir, S.M.M., E.R. El-Zahar, M. Modather, R.S.R. Gorla and A.M. Rashad, 2019. Unsteady MHD slip flow of a ferrofluid over an impulsively stretched vertical surface. AIP Adv., Vol. 9. 10.1063/1.5088610.
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  6. Ebaid, A., E.R. El-Zahar, A.F. Aljohani, B. Salah, M. Krid and J.T. Machado, 2019. Exact solutions of the generalized nonlinear Fokas-Lennells equation. Res. Phys., Vol. 14. 10.1016/j.rinp.2019.102472.
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  7. Ebaid, A., E.R. El-Zahar, A.F. Aljohani, B. Salah, M. Krid and J.T. Machado, 2019. Analysis of the two-dimensional fractional projectile motion in view of the experimental data. Nonlinear Dyn., 97: 1711-1720.
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  8. Chamkha, A.J., A.M. Rashad, E.R. El-Zahar and H.A. El-Mky, 2019. Analytical and numerical investigation of Fe3O4-water nanofluid flow over a moveable plane in a parallel stream with high suction. Energies, Vol. 12. 10.3390/en12010198.
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  9. El-Zahar, E.R. and A. Ebaid, 2018. On computing differential transform of nonlinear non-autonomous functions and its applications. Italian J. Pure Applied Math., 40: 711-723.
  10. Demiray, H. and E.R. El-Zahar, 2018. Cylindrical and spherical solitary waves in an electron-acoustic plasma with vortex electron distribution. Phys. Plasmas, Vol. 25. 10.1063/1.5021729.
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  11. Aljohani, A.F., R. Rach, E. El-Zahar, A.M. Wazwaz and A. Ebaid, 2018. Solution of the hyperbolic kepler equation by Adomian's asymptotic decomposition method. Rom. Rep. Phys., Vol. 70. .
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  12. Aljohani, A.F., E.R. El-Zahar, A. Ebaid, M. Ekici and A. Biswas, 2018. Optical soliton perturbation with Fokas-Lenells model by Riccati equation approach. Optik, 172: 741-745.
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  13. Ebaid, A., R. Rach and E. El-Zahar, 2017. A new analytical solution of the hyperbolic Kepler equation using the Adomian decomposition method. Acta Astronautica, 138: 1-9.
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  14. Ebaid, A., B. Masaedeh and E. El-Zahar, 2017. A new fractional model for the falling body problem. Chinese Phys. Lett., Vol. 34. 10.1088/0256-307X/34/2/020201.
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  15. El-Zahar, E.R., A.M.N. Ebady and H.M. Habib, 2016. An asymptotic semi-analytical method for third-order singularly perturbed boundary value problems. Global J. Pure Applied Math., 12: 253-263.
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  16. El-Zahar, E.R., 2016. Piecewise approximate analytical solutions of high-order singular perturbation problems with a discontinuous source term. Int. J. Different. Eq., Vol. 2016. 10.1155/2016/1015634.
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  17. El-Zahar, E. and S. El-Kabeir, 2016. Approximate analytical solution of nonlinear third-order singularly perturbed BVPs using homotopy analysis method-Pade method. J. Comput. Theor. Nanosci., 13: 8917-8927.
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  18. El-Kabeir, S.M., E.R. El-Zahar and A.M. Rashad, 2016. Effect of chemical reaction on heat and mass transfer by mixed convection flow of casson fluid about a sphere with partial slip. J. Comput. Theor. Nanosci., 13: 5218-5226.
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  19. Ebady, A.M., E.R. El-Zahar and A.M. Gelany, 2016. Piecewise rational approximate solutions of nonlinear transient circuits using adaptive step-size MsDTM-Pade method. J. Comput. Theor. Nanosci., 13: 5137-5142.
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  20. El-Zahar, E.R., 2015. Applications of adaptive multi step differential transform method to singular perturbation problems arising in science and engineering. Applied Math. Inform. Sci., 9: 223-232.
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  21. El-Zahar, E.R., Y.S. Hamed and H.M. Habib, 2014. A non-linear fifth order a-stable explicit one-step method for stiff systems arising in chemical reactions. Int. J. Pure Applied Math., 94: 341-354.
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  22. Habib, H.M., E.R. El-Zahar and A.M. Ebady, 2013. Prediction of wavy liquid film profile for thin film on a falling film absorber. Applied Math., 4: 785-791.
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  23. Habib, H.M. and E.R. El-Zahar, 2013. Mathematical modeling of heat-transfer for a moving sheet in a moving fluid. J. Applied Fluid Mechanics, 6: 369-373.
  24. El-Zahar, E.R., 2013. Approximate analytical solutions of singularly perturbed fourth order boundary value problems using differential transform method. J. King Saud Univ.-Sci., 25: 257-265.
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  25. El-Zahar, E.R., 2013. A non-linear absolutely-stable explicit numerical integration algorithm for stiff initial-value problems. Am. J. Applied Sci., 10: 1363-1370.
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  26. El-Zahar, E.R. and S.M.M. El-Kabeir, 2013. A new method for solving singularly perturbed boundary value problems. Applied Math. Inform. Sci., 7: 927-938.
  27. El Behady, E.E. and E.R. El-Zahar, 2013. Vibration reduction and stability study of a dynamical system under multi-excitation forces via active absorber. Int. J. Phys. Sci., 7: 6203-6209.
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  28. El-Zahar, E.R., 2012. Approximate analytical solutions for singularly perturbed boundary value problems by multi-step differential transform method. J. Applied Sci., 12: 2026-2034.
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  29. El-Zahar, E.R., 2012. An adaptive step-size taylor series based method and application to nonlinear biochemical reaction model. Trends Applied Sci. Res., 7: 901-912.
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  30. El-Zahar, E.R. and H.M. Habib, 2012. Mathematical modeling of heat-transfer for a moving sheet situated in a moving cooling fluid with application to sheet industry. Int. J. Phys. Math. Sci., 3: 112-116.
  31. Ebady, A.M.N., H.M. Habib and E.R. El-Zahar, 2012. A fourth order a-stable explicit one-step method for solving stiff differential systems arising in chemical reactions. Int. J. Pure Applied Math., 81: 803-812.
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  32. Abdou, M.M.M. and E.R. EL-Zahar, 2012. Variable viscosity effect on heat transfer over a continuous moving surface with variable internal heat generation in micropolar fluids. Applied Math. Sci., 6: 6365-6379.
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  33. Hamed, Y.S., M. Sayed, S.K. Elagan and E.R. EL-Zahar, 2011. The improved (G/G )-expansion method for solving (3+1)-dimensional potential-YTSF equation. J. Mod. Methods Numerical Math., 2: 32-38.
  34. El-Zahar, E.R. and Y.S. Hassanein, 2011. An algorithm for solving second order nonlinear singular perturbation boundary value problems. J. Mod. Methods Numer. Math., 2: 21-31.
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  35. Habib, H.M. and E.R. El-Zahar, 2010. A new algorithm for solving nonlinear stationary shock problems with mechanization. Applied Math. Inform. Sci., 4: 31-45.
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  36. El-Zahar, E.R., 2010. An initial-value algorithm for solving a class of non-linear singularly perturbed two-point boundary-value problems. Proceedings of the 5th International Conference of Mathematics and Engineering Physics, May 25-27, 2010, Cairo, Egypt -.
  37. El-Zahar, E.R., I.M. El-Desoky, E.M. Zaky and A.M. El-Refeay, 2009. A computer algebra algorithm for asymptotic analytical solution of singular perturbation problems. Proceedings of the 1st International Conference Computer Science from Algorithms to Application, December 8-10, 2009, Cairo, Egypt -.
  38. Habib, H.M. and E.R. El-Zahar, 2008. Variable step size initial value algorithm for singular perturbation problems using locally exact integration. Applied Math. Comput., 200: 330-340.
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  39. Habib, H.M. and E.R. El-Zahar, 2007. An algorithm for solving singular perturbation problems with mechanization. Applied Math. Comput., 188: 286-302.
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  40. Habib, H.M. and E.R. El-Zahar, 2005. A software package of finite-difference methods for two-point boundary value problems. Proceedings of the 14th International Conference on Intelligent and Adaptive Systems and Software Engineering, July 20-22, 2005, Toronto, Canada -.