[sriram9127]

hi every1
Im running a flow through pipe simulation to calculate pressure drop.
I did a simulation with/without gravity function but the results are same.Does gravity affects pressure drop??
How does the gravity function acts in the software.

[me3840]

Calculate each component of Bernoulli's equation and compare them for yourself in your case. Does the gravity term matter relative to the others?
https://en.wikipedia.org/wiki/Bernoulli%27s_principle

[lcarasik]

Originally Posted by sriram9127

hi every1
Im running a flow through pipe simulation to calculate pressure drop.
I did a simulation with/without gravity function but the results are same.Does gravity affects pressure drop??
How does the gravity function acts in the software.

If your situation does not include significant enough changes in buoyancy, you are not likely to see any effect on your simulation when using gravity.

Additionally Star-CCM+'s built-in gravity model only accounts for the vertical component of buoyancy effects. Further, you have to be careful when using the k-w family of turbulence models in Star-CCM+ with buoyancy driven or aided flows. It does not account for buoyancy effects in the turbulence equations for that specific family.