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UDF for Second Derivative of Velocity

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Old   March 6, 2004, 16:53
Default UDF for Second Derivative of Velocity
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Can any one help me, how to get the second order derivative of velocity and temperature for a cell using UDF ?

Like d2u/dx2


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Old   March 8, 2004, 05:15
Default Re: UDF for Second Derivative of Velocity
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Hi, I would suggest to do as follow:

U-velcoity_first_gradient = C_U_G(c,t) C_UDSI(c,t,0) = C_U_G(c,t) U-velocity_second_gradient = C_UDSI_G(c,t)

indeed: U-velcoity_first_gradient & U-velocity_second_gradient are arrays!

Cheers, thomas
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