//Pressure at inlet tothe elbow(in N/m^2):
p1=2.21*10^5;
//Area of crosssection(in m^2):
A1=0.01;
//Velocity at secton 2(in m/sec):
V2=16;
//Area of cross section of section 2(in m^2):
A2=0.0025;
//Atmospheric pressure(in kPa):
patm=1.012*10^5;