Liquid Holdup Calculations as post processing part of OpenFOAM

Ash Kot · October 19, 2020, 12:16

Hello All,

Performed interFoam based multiphase flow two sets of calculations.
Set.1: The liquid is flowing from the top to bottom in packing
Set.2: Liquid is flowing from top to bottom and simultaneously Gas is flowing from bottom to top (Counter-Current flow modeling).

Now, I have post-process data from which I want to calculate the liquid holdup in both sets, how to do that? How to do that in paraview or is there any 'functions-libs' that I can use to do these calculations and extract the values?
Also, extract the data of film thickness of the liquid, how to do that?
please let me know!

I did able to set up pressure drop as 'function-lib'.

Ash Kot · November 4, 2020, 23:54

Hello? Anyone? help needed!

Wenyuan · November 5, 2020, 05:17

Hi,

The holdup can be calculated using the volume-weighted average of the alpha field.

The film thickness calculation is more complicated, as described in this paper. If you only want to calculate film thickness for few locations, you can simply modify the interfaceHeight function object.

October 19, 2020, 12:16	Liquid Holdup Calculations as post processing part of OpenFOAM	#1
Ash Kot Member Ash Kotwal Join Date: Jul 2016 Location: North Dakota, USA Posts: 92 Blog Entries: 1 Rep Power: 10	Hello All, Performed interFoam based multiphase flow two sets of calculations. Set.1: The liquid is flowing from the top to bottom in packing Set.2: Liquid is flowing from top to bottom and simultaneously Gas is flowing from bottom to top (Counter-Current flow modeling). Now, I have post-process data from which I want to calculate the liquid holdup in both sets, how to do that? How to do that in paraview or is there any 'functions-libs' that I can use to do these calculations and extract the values? Also, extract the data of film thickness of the liquid, how to do that? please let me know! I did able to set up pressure drop as 'function-lib'.

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November 4, 2020, 23:54		#2
Ash Kot Member Ash Kotwal Join Date: Jul 2016 Location: North Dakota, USA Posts: 92 Blog Entries: 1 Rep Power: 10	Hello? Anyone? help needed!

November 5, 2020, 05:17		#3
Wenyuan New Member Wenyuan Fan Join Date: Mar 2017 Posts: 27 Rep Power: 9	Hi, The holdup can be calculated using the volume-weighted average of the alpha field. The film thickness calculation is more complicated, as described in this paper. If you only want to calculate film thickness for few locations, you can simply modify the interfaceHeight function object.