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Interpolation function for Velocity(x,t)
Posted Nov 30, 2020, 4:18 p.m. EST Computational Fluid Dynamics (CFD) Version 5.5 1 Reply
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Hi everyone! I am trying to use the function Interpolation to import velocity data that depends on position and time V(x,t) into COMSOL and set it as the outlet velocity boundary condition. Despite I tried to assign the units to the arguments as seconds and meters, respectively, as explained at "Common Settings for the Function Nodes" from Help documentation, the plot of the surface shows [m] for both x and y (the arguments) and [m/s] for z. When I call the interpolation function at Velocity Outlet boundary condition, and I use previously defined position and time variables with their units, I obtained an error about the expected units for velocity. Could you please help me with the unit assignment for the Interpolation function for a V(x,t) data set? Thank you in advance!
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Hi, Ruth Alejandra. You should assign the units to the arguments as m,s, and the function as m/s, respectively. And then you can call the interpolation function as v(x,t).
All the best,
Songcai