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Momentum Souce term

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Old   May 30, 2020, 13:55
Default Momentum Souce term
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Francisco Machado
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Hey everyone,

I want to introduce an acceleration in my domain. I'm aware i must do it using the "momentum source term".

My question is regarding the units. Star-CCM uses N/m^3 and, of course, my acceleration is in m/s^2. Do I need to convert the units? I thought I'd read somewhere that we can put it as an acceleration and star would return it, in the units star uses.

Anyway, thank you in advance and hope you're all safe.
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Old   June 2, 2020, 11:19
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Matt
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I am not sure about that, I have not seen that ability but it could be true.

I believe that if you divide the source term by density, you are left with acceleration, no?

F/V (N/m^3) / rho (kg/m^3) = a (m/s^2)

So source term is acceleration x density.
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