Derivate Equation

fabriciotb · October 16, 2015, 20:03

Hello.

I would like to know how is the more practical way to insert a partial derivate equation (dT/dx).

Thanks.

me3840 · October 17, 2015, 02:18

The only method of doing this would be to use user coding, and I'm not entirely sure if that's even possible.

You are better off using OpenFOAM for this.

mi_cfd · October 19, 2015, 19:28

You can define a user field function and use the operator grad($phi), where phi is any scalar quantity.

The resulting function is the vector: d_phi/dx i + d_phi/dy j + d_phi/dz k

So, you can then use any component of the function for further calculations.

October 16, 2015, 20:03	Derivate Equation	#1
fabriciotb New Member Fabricio Join Date: Dec 2009 Location: Brazil - São Paulo Posts: 28 Rep Power: 16	Hello. I would like to know how is the more practical way to insert a partial derivate equation (dT/dx). Thanks.

October 19, 2015, 19:28		#3
mi_cfd New Member Join Date: Apr 2009 Posts: 5 Rep Power: 17	You can define a user field function and use the operator grad($phi), where phi is any scalar quantity. The resulting function is the vector: d_phi/dx i + d_phi/dy j + d_phi/dz k So, you can then use any component of the function for further calculations. ramakant likes this.

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October 17, 2015, 02:18		#2
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	The only method of doing this would be to use user coding, and I'm not entirely sure if that's even possible. You are better off using OpenFOAM for this.