Is alphas correct for more than three phase?

dokeun · May 1, 2019, 00:44

Hello

I'm solving two propellants mixing in air with multiphaseInterFoam.

As you know alpha values are set as 0, 1, 2 ... for each phase in multiphaseInterFoam and after calculation we can plot alphas the results in paraview.

The problem is that there are regions in which alpha = 1 even though only two phases(alpha=0, 2) are in contact.

Is there a solution for this problem?

rupak504 · May 2, 2019, 04:11

I also have the same issue.......

dokeun · May 3, 2019, 12:07

At first, I had to write this thread in Paraview forum not Openfoam.

The result was shown better when I used ‘clip’ for ‘each phase’ and apply ‘Use log scale when mapping data to colors.

or threadhold would be good with 0.0~01 to 1 for the value.

vishalgarg474 · February 9, 2021, 12:34

Hey. I have a problem in understanding. How are they defined for the phases?

I defined three phases (waterdia1 waterdia2 air)

so will they be assigned 0, 1, and 2 respectively?

May 1, 2019, 00:44	Is alphas correct for more than three phase?	#1
dokeun Member Dokeun, Hwang Join Date: Apr 2010 Location: Korea, Republic of Posts: 98 Rep Power: 16	Hello I'm solving two propellants mixing in air with multiphaseInterFoam. As you know alpha values are set as 0, 1, 2 ... for each phase in multiphaseInterFoam and after calculation we can plot alphas the results in paraview. The problem is that there are regions in which alpha = 1 even though only two phases(alpha=0, 2) are in contact. Is there a solution for this problem? Last edited by dokeun; May 2, 2019 at 03:33.

May 3, 2019, 12:07		#3
dokeun Member Dokeun, Hwang Join Date: Apr 2010 Location: Korea, Republic of Posts: 98 Rep Power: 16	At first, I had to write this thread in Paraview forum not Openfoam. The result was shown better when I used ‘clip’ for ‘each phase’ and apply ‘Use log scale when mapping data to colors. or threadhold would be good with 0.0~01 to 1 for the value. Last edited by dokeun; May 7, 2019 at 23:36.

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May 2, 2019, 04:11		#2
rupak504 Senior Member Lolita Join Date: Aug 2016 Posts: 118 Rep Power: 10	I also have the same issue.......

February 9, 2021, 12:34		#4
vishalgarg474 New Member Vishal Join Date: Sep 2020 Posts: 6 Rep Power: 6	Hey. I have a problem in understanding. How are they defined for the phases? I defined three phases (waterdia1 waterdia2 air) so will they be assigned 0, 1, and 2 respectively?