Flow over Bicycle Using MATLAB

Aim:

To write a Matlab program to calculate drag force against a cyclist.

Code for drag force with velocity

clear all
close all
clc

rho = 1.2;
a = 0.1;
cd = 0.8;
v = 1:50;

f = rho * a * v.^2 * cd/2;

plot(v,f,'LineWidth',2)

xlabel('VELOCITY')
ylabel('DRAG FORCE')

I create a matrix for velocity using the range operator and using the formula the drag force calculated

Output Graph

The drag force varies with the square of the velocity so the plot is like a parabolic curve

clear all
close all
clc

rho = 1.2;
a = 0.1;
cd =[0.81,0.42,0.47,1.07,0.09,0.04];
v = 10;

f = rho * a * v^2 *cd./2;

plot(cd,f,'LineWidth',2)
xlabel('DRAG COEFFICIENT')
ylabel('DRAG FORCE')

Various drag coefficient values are taken from the internet and created a matrix

Output Graph

The drag force varies with the drag coefficient linearly So the plot is a straight line

Thank You