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

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Presentation transcript:

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)

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