Getting a constant velocity gradient in simulation -- CFD Online Discussion Forums

November 26, 2020, 15:41	Getting a constant velocity gradient in simulation	#1
Shibi Member Join Date: Feb 2020 Posts: 90 Rep Power: 6	Hello to all, I would like to know if it is possible to obtain a constant velocity gradient in the Cavity simulation in OpenFoam. In OpenFoam the velocity gradient is given by: $\nabla u=\begin{pmatrix} \partial u_{1}/\partial x_{1} & \partial u_{2}/\partial x_{1} &\partial u_{3}/\partial x_{1} \\ \partial u_{1}/\partial x_{2} & \partial u_{2}/\partial x_{2} & \partial u_{3}/\partial x_{2}\\ \partial u_{1}/\partial x_{3}&\partial u_{2}/\partial x_{3} &\partial u_{3}/\partial x_{3} \end{pmatrix}$ I would like to have throughout the simulation: $\nabla u=\begin{pmatrix} 0 & 1 & 0\\ 0 & 0 & 0\\ 0& 0 & 0 \end{pmatrix}$ Is there any utility to do this? Best Regards!

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