CFD computational fluid dynamics problem

2013 12 25
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更新时间：2016 4 16
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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.

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Milan
Milan 2014-2-4
编辑：Milan 2014-2-4

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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.

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QiQin Zhan
QiQin Zhan 2014-2-7
Probably you should type .*
Milan
Milan 2014-2-7
编辑：Milan 2014-2-7
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
Ysabel Huaccallo 2016-4-16
Hello, has anyone export data from matlab to FlexPde? Please I need to pass my simulation of CFD to Flexpde.

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