CFD computational fluid dynamics problem

Dear

I ve been working on particular problem of flow fluid through channel of rectangular cross section,geometry and metric data are listed below. My question is how to program this particular diferential equation (dp/dx) thanks in advance.

Answer 1

[Milan]

I try to do this plot, but when i try do sum, get error. Any suggestion how ti deal with this?

>> suma=sum(-1).^((i-1)/2).*[1-(cosh(i*pi*z)./(2*a))./(cosh((i*pi*b)./(2*a)))].*(cosh((i*pi*y)./(2*a)/i^3))

Error using *

Inner matrix dimensions must agree.

[QiQin Zhan]

Probably you should type .*

[Milan]

I solve this problem, but I get another one. When I try to get mesh, report me next:

*>> mesh(x,y,z)

Error using mesh (line 76)

Z must be a matrix, not a scalar or vector*

Simple example whose I folow is:

>> [x,y]=meshgrid(-2:0.1:2, -2:0.1:2)

>> z=exp(-(x.*x+y.*y))

>> mesh(x,y,z)

And show me a 3D mesh. "y" and "z" in function is 0.1:0.1:1. For coordinate I put "Y"" and "Z". Try and see that matlab see difference between "y" and "Y". Any suggestion how to solve this?

P.S. I google this problem, but dont understand very well, amatuer in matlab...

[Ysabel Huaccallo]

Hello, has anyone export data from matlab to FlexPde? Please I need to pass my simulation of CFD to Flexpde.