Plot the streamlines and pressure for flow around a rotating cylinder

Question

erq 2013-12-13

回答： Simon 2013-12-13

r0=1,U=1,p=1,0<theta<2pi,r0<r<3r0, generate gamma=0, gamma=-2pir0U.

LAMBDA = 1.; Pinf = 1.; U = 1.;

th = linspace(0,2*pi,100); r = linspace(0.1,1,100); [TH,R] = meshgrid(th,r); [X,Y] = pol2cart(TH,R);

PSI = -LAMBDA.*sin(TH)./R; VR = -LAMBDA./(R.^2).*cos(TH); VTH = -LAMBDA./(R.^2).*sin(TH); P = Pinf + U^2/2 - (VR.^2 + VTH.^2)/2;

figure contourf(X,Y,P,20,'LineColor','none'); hold on; contour(X,Y,PSI,20,'-k.','LineWidth',1); axis equal; xlabel('X'); ylabel('Y');

Answer 1

Simon 2013-12-13

Hi!

Please use the code formatting for pasting code, thanks!

And what is the question? What did you do? Where does the code come from? What does it calculate?