VOF and grid

November 20, 2000, 07:52

Dears,

I am trying to analyse a simple ship hull by VOF model. Using an hybrid mesh (the only possible by Gambit, in this particular problem) the free-surface goes down abnormally. I have discussed about this with others and it seems that the problem is the type of mesh which must be structured instead.

Is it true?

Thank you very much

Giovanni

December 18, 2000, 17:37

1)U can't use all type of VOF schemes for any kind of mesh. 2) Try to enable the gravity

Dave

February 13, 2001, 08:13

Dear Dave, I hope you refers to one of my previous messages about ship hull analysis.

My first problem is that, if I enable operating density (air), the free surface goes down.

According to you it is important to impose a profile (rho*g*z) for pressure in pressure outlet boundary condition below the ship, rater than a 0 Pa (gauge-pressure)?

Thanks a lot Giovanni

November 20, 2000, 07:52	VOF and grid	#1
Giovanni Guest Posts: n/a	Dears, I am trying to analyse a simple ship hull by VOF model. Using an hybrid mesh (the only possible by Gambit, in this particular problem) the free-surface goes down abnormally. I have discussed about this with others and it seems that the problem is the type of mesh which must be structured instead. Is it true? Thank you very much Giovanni

December 18, 2000, 17:37	Re: VOF and grid	#2
Dave Guest Posts: n/a	1)U can't use all type of VOF schemes for any kind of mesh. 2) Try to enable the gravity Dave

February 13, 2001, 08:13	Re: VOF and grid	#3
Giovanni Guest Posts: n/a	Dear Dave, I hope you refers to one of my previous messages about ship hull analysis. My first problem is that, if I enable operating density (air), the free surface goes down. According to you it is important to impose a profile (rhogz) for pressure in pressure outlet boundary condition below the ship, rater than a 0 Pa (gauge-pressure)? Thanks a lot Giovanni

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