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Search took 0.00 seconds. Search: Posts Made By: ngj
Forum: OpenFOAM January 2, 2013, 12:34
Replies: 39
Views: 5,511
Posted By ngj
Hi Kent, I agree that tweaking the gravity...

Hi Kent,

I agree that tweaking the gravity vector is not feasible in production runs if a particular mean velocity is needed, however, it is a very good way to understand what is happening in the...
Forum: OpenFOAM January 2, 2013, 11:59
Replies: 39
Views: 5,511
Posted By ngj
With respect to post #30 would you have forgotten...

With respect to post #30 would you have forgotten to put the initial velocities to (0 0 0) in the simulation?

With respect to the figures concerning the tilting of the gravity vector it looks...
Forum: OpenFOAM December 22, 2012, 15:54
Replies: 39
Views: 5,511
Posted By ngj
Sorry, studied your drawing again, so you already...

Sorry, studied your drawing again, so you already gave the dimensions.

Merry Christmas,

Niels
Forum: OpenFOAM December 22, 2012, 15:52
Replies: 39
Views: 5,511
Posted By ngj
Hi Amin, Let us try something different. ...

Hi Amin,

Let us try something different.

Close all of the boundaries but keep the present boundary condition for the cylinder. What I mean is that you apply wall boundary conditions on all the...
Forum: OpenFOAM December 18, 2012, 10:21
Replies: 39
Views: 5,511
Posted By ngj
Hi Anim, A gravity vector pointing in the...

Hi Anim,

A gravity vector pointing in the non-vertical direction is merely the same system represented in a different coordinate system, so it should work.

Kind regards,

Niels
Forum: OpenFOAM December 16, 2012, 14:39
Replies: 39
Views: 5,511
Posted By ngj
Hi Amin, Something just occurred to me. You...

Hi Amin,

Something just occurred to me. You are specifying a flow rate over the water column and you are specifying the water level at the inlet.

In order to maintain this flow condition, you...
Forum: OpenFOAM December 12, 2012, 05:14
Replies: 39
Views: 5,511
Posted By ngj
Hi It seems that your boundary conditions...

Hi

It seems that your boundary conditions mostly makes sense, however, is it deliberate that you have a non-zero velocity and specify the value of alpha on the bottom boundary?

If you want to...
Forum: OpenFOAM December 12, 2012, 03:59
Replies: 39
Views: 5,511
Posted By ngj
What are the boundary conditions for the...

What are the boundary conditions for the velocity? If your are not loosing water without the cylinder, but loosing water with the cylinder, it appears you have a flux over the cylinder wall.

The...
Forum: OpenFOAM December 11, 2012, 09:25
Replies: 39
Views: 5,511
Posted By ngj
Hi Anim, It sounds like the boundary...

Hi Anim,

It sounds like the boundary conditions on the cylinder are wrong. Would you be so kind as to post them here (along with the other boundary conditions).

BTW: Are you using 1.6 or...
Showing results 1 to 9 of 9

 
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