The Islamic University of Gaza Faculty of Engineering Numerical Analysis ECIV 3306 Introduction.

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Presentation transcript:

The Islamic University of Gaza Faculty of Engineering Numerical Analysis ECIV 3306 Introduction

Consider the following equations.

Numerical Methods - Definitions

Numerical Methods

Analytical vs. Numerical methods

Mathematician and Engineer

Reasons to study numerical Analysis Powerful problem solving techniques and can be used to handle large systems of equations It enables you to intelligently use the commercial software packages as well as designing your own algorithm. Numerical Methods are efficient vehicles in learning to use computers It Reinforce your understanding of mathematics; where it reduces higher mathematics to basic arithmetic operation.

Course Contents

The Islamic University of Gaza Faculty of Engineering Civil Engineering Department Numerical Analysis ECIV 3306 Chapter 1 Mathematical Modeling

Chapter 1: Mathematical Modeling Mathematical Model A formulation or equation that expresses the essential features of a physical system or process in mathematical terms. Generally, it can be represented as a functional relationship of the form

Mathematical Modeling

Simple Mathematical Model Example: Newton’s Second Law (The time rate of change of momentum of a body is equal to the resultant force acting on it) a = acceleration (m/s 2 ) ….the dependent variable m = mass of the object (kg) ….the parameter representing a property of the system. f = force acting on the body (N)

Typical characteristics of Math. model It describes a natural process or system in mathematical way It represents the idealization and simplification of reality. It yields reproducible results, and can be used for predictive purpose.

Complex Mathematical Model Example: Newton’s Second Law Where: c = drag coefficient (kg/s), v = falling velocity (m/s)

Complex Mathematical Model At rest: (v = 0 at t = 0), Calculus can be used to solve the equation

Analytical solution to Newton's Second Law.

Numerical Solution to Newton's Second Law  Numerical solution: approximates the exact solution by arithmetic operations. Suppose

Numerical Solution to Newton's Second Law.

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Comparison between Analytical vs. Numerical Solution