initial commit / add all books

1 files changed, 37 insertions, 0 deletions

diff --git a/3720/CH7/EX7.10/Ex7_10.sce b/3720/CH7/EX7.10/Ex7_10.sce
new file mode 100644
index 000000000..f8e449a92
--- /dev/null
+++ b/3720/CH7/EX7.10/Ex7_10.sce
@@ -0,0 +1,37 @@
+//Example 7_10

+clc;clear;

+// Given values

+L_m=0.991;// Length of the model truck in m

+h_m=0.257;// Height of the model truck in m

+w_m=0.159;// Width of the model truck in m

+V_p=26.8;// Velocity of the prototype in m/s

+T=25;// °C

+C=16;// Geometric ratio

+

+// Properties

+//For air at atmospheric pressure and at T=25°C,

+rho_m=1.184;// Density of air in kg/m^3

+mu_m=1.849*10^-5;// Viscosity of air in kg/m.s

+

+// Calculation 

+// From table 7.7,

+V_m=[20 25 30 35 40 45 50 55 60 65 70];// Velocity  of the model truck in m/s

+F_D=[12.4 19.0 22.1 29.0 34.3 39.9 47.2 55.5 66.0 77.6 89.9];// Drag force of the model truck in N

+for(i=1:11)

+    A_m=w_m*h_m;// Area of the model truck in m^2

+    C_Dm(i)=(F_D(i))/((1/2)*rho_m*(V_m(i))^2*A_m);// Drag coefficient 

+    Re_m(i)=(rho_m*V_m(i)*w_m)/(mu_m);// Reynolds number of the model truck

+end

+xlabel('Re*10^-5');

+ylabel('C_D');

+xtitle('FIGURE 7-41');

+plot((Re_m/10^5),C_Dm,'o');

+rho_p=rho_m;// Density of air in kg/m^3

+w_p=w_m;// Width of the prototype in m

+mu_p=mu_m;// Viscosity of air in kg/m.s

+Re_p=(rho_p*V_p*w_p)/(mu_p);// Reynolds number of the prototype

+A_p=A_m;// // Area of the prototype in m^2

+C_Dp=C_Dm(10);// Drag coefficient 

+F_Dp=(1/2)*rho_p*V_p^2*C^2*A_p*C_Dp;// Aerodynamic drag on the prototype in N

+printf("The aerodynamic drag on the vehicle=%0.0f N\n",F_Dp);

+// The answer provided in the textbook is wrong