2 files changed, 19 insertions, 0 deletions
diff --git a/629/CH4/EX4.12/ex4_12.txt b/629/CH4/EX4.12/ex4_12.txt
new file mode 100644
index 000000000..b067ae916
--- /dev/null
+++ b/629/CH4/EX4.12/ex4_12.txt
@@ -0,0 +1,5 @@
+ 
+The velocity at 10km from the center = 16 m/s.
+
+The pressure difference between two locations = 806 Pa.
+ 
+\ No newline at end of file
diff --git a/629/CH4/EX4.12/example4_12.sce b/629/CH4/EX4.12/example4_12.sce
new file mode 100644
index 000000000..7639c1e58
--- /dev/null
+++ b/629/CH4/EX4.12/example4_12.sce
@@ -0,0 +1,14 @@
+clear
+clc
+//Example 4.12 VELOCITY AND PRESSURE DISTRIBUTION IN A FREE VORTEX
+rho=1.2; //density[kg/m^3]
+r1=4; //[km]
+r2=10; //[km]
+V1=40; //velocity[m/s]
+//Velocity distribution, V=C/r
+C=r1*V1 
+V2=C/r2 //[m/s]
+printf("\nThe velocity at 10km from the center = %.f m/s.\n",V2)
+//Bernoulli equation, for horizontal plane
+delp=rho*(V1^2-V2^2)/2 //delp=p2-p1,[Pa]
+printf("\nThe pressure difference between two locations = %.f Pa.\n",delp)
+\ No newline at end of file