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Expression and Syntax for PDEs

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Old   November 17, 2008, 22:56
Default Expression and Syntax for PDEs
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I wish to define a diffusive, conductive coupled system of pdes in cfx for simulation. Is it possible to define an expression which would formulate a problem similar to:

u_t= u_xx + u_yy + u_x + u_y - u*v v_t= v_xx + v_yy + v_x + v_y - u*v

Would anyone know the syntax for the expression?

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Old   November 17, 2008, 22:58
Default Re: Expression and Syntax for PDEs
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Sorry equations should read:

u_t= u_xx + u_yy + u_x + u_y - u*v


v_t= v_xx + v_yy + v_x + v_y - u*v
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Old   January 3, 2010, 05:19
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Ali Heydari
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I have the same problem in defining an expression with some partial derivatives including derivative of velocity with respect to lenght x.
please help me on this.
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