Dr. Ajmia Younes Orfi

Assistant professor of Mathematics

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Dr. Ajmia Younes Orfi is an assistant Professor of Mathematics at AlFaisal University, Riyadh, Saudi Arabia. She obtained her PhD Degree in Applied Mathematics: (June 2017) (with very honourable mention) from department of Mathematics, Faculty of Sciences of Tunis, University of Tunis-El Manar, Tunisia. Thesis Title: A priori and a posteriori error analysis using Finite Element Method: Applications to unsteady Darcy and Darcy-Stokes equations. She earned her master's degree in applied mathematics: (Feb 2009) (with an award of excellence) from University of Moncton, New Brunswick, Canada. Project title: A posteriori error estimator for mixed dual finite element methods of linear elasticity problems.
She had been adjunct professor at AlFaisal University from Fall 2019 to Spring 2024. She worked as teaching assistant at the University of Moncton and lecturer at King Saud University, College of Business Administration, Department of Quantitative Analysis.
Her research interests include the development of finite element method in general, with a focus on the a priori and a posteriori error estimators analysis and solving complex problems related to physical and biomedical problems including unsteady and steady Darcy and coupled Darcy-Stokes equations, linear elasticity equations, etc. for flow with heat in porous media, blood flow in arteries, flow in deformable walls etc.
During her PhD thesis period and after, Dr Ajmia Younes Orfi had the opportunity to work closely under the supervision of the late Prof. Christine Bernardi, from the Sorbonne University and Pierre-Marie Curie University (UPMC), Paris, France.

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A posteriori error estimates of finite element method for the time-dependent Darcy problem in an axisymmetric domain

Journal Article ,
Orfi, Y. A. (2019). A posteriori error estimates of finite element method for the time-dependent Darcy problem in an axisymmetric domain. Computers & Mathematics With Applications, 77(10). https://doi.org/10.1016/j.camwa.2019.01.016 (Original work published 2019)

A posteriori error analysis of the fully discretized time-dependent coupled Darcy and Stokes equations

Journal Article ,
Bernardi, A. O. C. (2018). A posteriori error analysis of the fully discretized time-dependent coupled Darcy and Stokes equations. Computers & Mathematics With Applications, 76(2), 20. https://doi.org/https://doi.org/10.1016/j.camwa.2018.04.021 (Original work published 2018)

A priori error analysis of an Euler implicit, finite element approximation of the unsteady Darcy problem in an axisymmetric domain

Journal Article ,
Orfi, D. Y. A. Y. (2018). A priori error analysis of an Euler implicit, finite element approximation of the unsteady Darcy problem in an axisymmetric domain. Advances in Applied Mathematics and Mechanics, 10, 21. https://doi.org/10.4208/aamm.OA-2016-0055 (Original work published 2018)

A priori error analysis of the fully discretized time-dependent coupled Darcy and Stokes equations

Journal Article ,
Bernardi, A. Y. O. C. (2016). A priori error analysis of the fully discretized time-dependent coupled Darcy and Stokes equations. SeMA Journal, 73, 97-119. https://doi.org/10.1007/s40324-015-0058-5 (Original work published 2016)

Finite element discretization of the time dependent axisymmetric Darcy problem

Journal Article ,
Bernardi, A. Y. O. C. (2015). Finite element discretization of the time dependent axisymmetric Darcy problem. SeMA Journal, 68, 53-80. https://doi.org/10.1007/s40324-015-0032-2 (Original work published 2015)

A Posteriori Error Estimates for a Dual Mixed Finite Element Method of the Elasticity Problem

Journal Article ,
Farhloul, Y. O. M. (2015). A Posteriori Error Estimates for a Dual Mixed Finite Element Method of the Elasticity Problem. Universal Journal of Applied Mathematics & Computation, 3, 70-86. Retrieved from https://www.papersciences.com/Farhloul-Univ-J-Appl-Math-Comp-Vol3-2015-7.pdf (Original work published 2015)

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Classes

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MAT 224: Numerical Methods

Based on the fact that almost realistic engineering problems cannot be solved analytically, industry’s interest in applying numerical methods to simulate engineering applications has sustained a phenomenal growth in order to better understand physical phenomena, reduce cost and time-to-market of products. In this course, students will learn fundamental mathematical techniques to solve many problems numerically that will contribute substantially to the understanding of many of their future courses and to make them successful engineers. Many examples and exercises on application of the methods to simplified/model of real-life and engineering will be included along with their implementation in MATLAB package that combines computation, advanced graphics and visualization, and a high-level programming language. GNU OCTAVE, an open source software, is accepted as an alternative to MALAB, since it has a very similar environment and syntax with the advantage to be free. The numerical techniques students will learn are essentially; numerical methods for solving nonlinear scalar equations, linear systems, initial value problem (ODEs), interpolation, numerical differentiation and integration and estimating eigenvalue and eigenvectors.

MAT 211: Calculus III

This course deals with multi-dimensional calculus. It is designed primarily for engineering majors and is taken by other technical majors. The student will develop an understanding of limits and continuity of functions of several variables; compute partial derivatives and apply to optimization problems; set up and compute iterated integrals to compute areas, volumes of solids; understand and apply Green’s Theorem, the Divergence Theorem and Stoke’s Theorem.

MAT 116: Calculus for Biomedical Sciences II

This introductory course will give the student an overview of descriptive and inferential statistical methods. This course offers a solid introduction to differential and integral calculus and is designed for students in the biomedical sciences. The course begins with an intensive review of important topics from Calculus I: differentiation, derivative rules, optimization, anti-derivatives, definite integral, and fundamental theorem of calculus. Then the Calculus II will continue with techniques of integration for functions of one variable, multivariable functions together with partial derivatives and multiple integrals, and differential equations together with applications.

MAT 212: Linear Algebra

This course provides an introduction to linear algebra topics. Emphasis is placed on the development of abstract concepts and applications for vectors, systems of equations, matrices, determinants, vector spaces, multi-dimensional linear transformations, eigenvectors, eigenvalues, diagonalization and orthogonality. Upon completion, students should be able to demonstrate understanding of the theoretical concepts and select and use appropriate models and techniques for finding solutions to linear algebra-related problems with and without technology

MAT 112: Calculus II

This course is a continuation to Calculus I. The course covers basic mathematical analysis and tools, widely used in more sophisticated mathematics-based tools in various areas. The topics include Integration techniques, applications of integration like volumes by disk and cylindrical shells methods, Arc length and area of a surface of revolution, parametric equations and polar coordinates, conic sections, infinite sequences and series.

MAT 213: Differential Equations

This course is an introduction to the theory and application of ordinary differential equations and the

Laplace transform. The main objective is for the student to develop competency in the basic concepts and

master certain solution methods. Topics covered include linear and nonlinear first order equations; higher

order linear differential equations; undetermined coefficients method; variation of parameters method;

Cauchy-Euler equation; Laplace transform; linear systems solution; solution by series method.

MAT 111: Business Calculus

The main objective of this course is to help the student in understanding the basic concepts of calculus on the one hand, and to develop the skills needed for using calculus as a viable tool to solve problems that arise in the study of business and economics. Topic covered include, limits, types of functions (polynomial, rational, exponential and logarithmic), their derivatives, anti-derivatives and their various applications.