Unit in passive scalar source

[peempeem]

Hi, I have question about passive scalar source. What does 1/m^3.s mean? and where I can find the definition?

Thanks in advance.

[bbhagat98]

Hi there,
Since passive scalars do not affect the dynamics of fluid flow, units for passive scalars are independent to the unit system of simulation. Thus one can define a passive scalar flux as 100 1/𝑠 and interpret it as a flux of 100 𝑔/𝑠 or 100 𝑘𝑔/𝑠 as per one’s convenience.
You might have your answer to your question in this article about Passive Scalar Sources
I hope this helps

[peempeem]

thank you!