CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums

Search Results

Register Blogs Community New Posts Updated Threads Search

Page 1 of 2 1 2
Showing results 1 to 25 of 37
Search took 0.00 seconds. Search: Posts Made By: sega
Forum: OpenFOAM Running, Solving & CFD November 6, 2008, 15:00
Replies: 59
Views: 5,340
Posted By sega
Hey Niels. Thanks for your

Hey Niels.

Thanks for your response.
I have discussing this curve in another thread:
http://www.cfd-online.com/cgi-bin/OpenFOAM_Discus/show.cgi?1/9803

Maybe the average is not as bad -...
Forum: OpenFOAM Running, Solving & CFD November 1, 2008, 10:22
Replies: 59
Views: 5,340
Posted By sega
Hey Niels. Remember the cas

Hey Niels.

Remember the case?
I'm still coming back to this simulation from time to time.

I'm referring to one of your messages above, this one:
In this I got the same problem as you,...
Forum: OpenFOAM Running, Solving & CFD September 26, 2008, 04:38
Replies: 59
Views: 5,340
Posted By sega
Hello. Sorry to bother agai

Hello.

Sorry to bother again. I have tried a different boundary condition for the pressure.
(I'm not talking about the wedge case)

Instead of using pd=0 on all the walls I have used...
Forum: OpenFOAM Running, Solving & CFD September 25, 2008, 13:10
Replies: 59
Views: 5,340
Posted By sega
Lets get back at this. Obvious

Lets get back at this. Obviously the problem is really challenging.

Meanwhile I did a lot of different stuff with the case. Lets have a look at some points I couldn't fix myself.

First of...
Forum: OpenFOAM Running, Solving & CFD September 23, 2008, 11:42
Replies: 59
Views: 5,340
Posted By sega
I can see the pictures. The a

I can see the pictures.
The above one is volPointInterpolate(pd).

??
Forum: OpenFOAM Running, Solving & CFD September 23, 2008, 11:02
Replies: 59
Views: 5,340
Posted By sega
Hey! It's me again. I'm sti

Hey!

It's me again. I'm still thinking about this case. As I have recognised there is a difference between the value of volPointInterpolate(pd) and cell(pd).

As the pressure-jump over the...
Forum: OpenFOAM Running, Solving & CFD May 26, 2008, 08:36
Replies: 59
Views: 5,340
Posted By sega
A guy from the university coul

A guy from the university could decrease the error in his pressure-jump to about 4% ...
He was using Fluent with a TRIANGULAR mesh ...
Forum: OpenFOAM Running, Solving & CFD May 25, 2008, 05:52
Replies: 59
Views: 5,340
Posted By sega
I tried to give the mesh some

I tried to give the mesh some arcs in the interiour of the bubble, but the solver is stuck.
Maybe the control volumes are too much contortet.
...
Forum: OpenFOAM Running, Solving & CFD May 25, 2008, 03:56
Replies: 59
Views: 5,340
Posted By sega
So, now I did a calculation on

So, now I did a calculation on a mesh which is spherical at the final position of the bubble - like Niels suggested.

But there are still problems.
The pressure is a little bit higher, but not...
Forum: OpenFOAM Running, Solving & CFD May 22, 2008, 01:45
Replies: 59
Views: 5,340
Posted By sega
Ok, I have used the threshold-

Ok, I have used the threshold-function to display the interior of the bubble and did a "Reset Range" on the pressure plot.

http://www.cfd-online.com/OpenFOAM_Discus/messages/1/7784.png
...
Forum: OpenFOAM Running, Solving & CFD May 21, 2008, 09:33
Replies: 59
Views: 5,340
Posted By sega
So, now I tried the static ini

So, now I tried the static initialized spherical bubble:

http://www.cfd-online.com/OpenFOAM_Discus/messages/1/7770.png
http://www.cfd-online.com/OpenFOAM_Discus/messages/1/7771.png
...
Forum: OpenFOAM Running, Solving & CFD May 21, 2008, 08:19
Replies: 59
Views: 5,340
Posted By sega
Your recommended setup is not

Your recommended setup is not working by now.
I tried to use the upper right quarter of the computational domain.
But as I have mentioned earlier this symmetry is not working.

The solver is...
Forum: OpenFOAM Running, Solving & CFD May 20, 2008, 12:24
Replies: 59
Views: 5,340
Posted By sega
Hey. I think before I start

Hey.

I think before I start a wild gambling with the symmetry planes I rather restart the case without the benefits of symmetry.

I will come back with the results ... bet on it!
...
Forum: OpenFOAM Running, Solving & CFD May 20, 2008, 10:10
Replies: 59
Views: 5,340
Posted By sega
Meanwhile I had a talk with my

Meanwhile I had a talk with my academic advisor at the faculty I'm writing my student research project.

Obviously there is another student who is doing the same test-case like me.
He is...
Forum: OpenFOAM Running, Solving & CFD May 20, 2008, 10:00
Replies: 59
Views: 5,340
Posted By sega
So, now I made some changes to

So, now I made some changes to the boundary conditions:

left & bottom: symmetryPlane for all variable (U,pd,gamma)

top: 0 for U, totalPressure for pd

right: 0 for U, zeroGradient for...
Forum: OpenFOAM Running, Solving & CFD May 19, 2008, 14:44
Replies: 59
Views: 5,340
Posted By sega
Hey. Mapping (funkySetField

Hey.

Mapping (funkySetFields) the pd-field brought some even more disturbing results.

What about U? I think it should be zero all over the geometry, thus I leave it uniform (0 0 0).

I...
Forum: OpenFOAM Running, Solving & CFD May 19, 2008, 09:53
Replies: 59
Views: 5,340
Posted By sega
Of course the file was too big

Of course the file was too big.

Now it's here:
http://therealsega.th.funpic.de/openfoam/cas10aSend.tar.gz
Forum: OpenFOAM Running, Solving & CFD May 19, 2008, 09:45
Replies: 59
Views: 5,340
Posted By sega
Hey. I'm still playing with

Hey.

I'm still playing with this problem.

I did the following:
Defining a spherical gamma-field with this setup:



It's a quarter of a circel (due to symmetrical reasons).
Forum: OpenFOAM Running, Solving & CFD May 16, 2008, 07:32
Replies: 59
Views: 5,340
Posted By sega
Hey Niels. I stumbled over

Hey Niels.

I stumbled over interFoamPressure in this post:
http://www.cfd-online.com/OpenFOAM_Discus/messages/1/5619.html
The link (svn checkout) is in the third post ...

Greetings - S.
Forum: OpenFOAM Running, Solving & CFD May 15, 2008, 14:47
Replies: 59
Views: 5,340
Posted By sega
Somehow I could make interFoam

Somehow I could make interFoamPressure work and ran it over my results.

So now the pressure (p) is 0.85 N/mē ... 0.1 N/mē less than pd
Wrong direction as it should be 1.04 N/mē ...

Any...
Forum: OpenFOAM Running, Solving & CFD May 14, 2008, 11:43
Replies: 59
Views: 5,340
Posted By sega
Two things: 1. There seems

Two things:

1. There seems to be a tool called interFoamPressure to calculate the static pressure instead of the dynamic.
Maybe this can settle the error?

2. How can I get a value for the...
Forum: OpenFOAM Running, Solving & CFD May 14, 2008, 11:03
Replies: 59
Views: 5,340
Posted By sega
Is it possible that we are com

Is it possible that we are comparing dynamic with static pressure?
Forum: OpenFOAM Running, Solving & CFD May 14, 2008, 03:10
Replies: 59
Views: 5,340
Posted By sega
Well, ok. I think I will have

Well, ok. I think I will have a talk about this divScheme with the guys at the university.

But first I have to know what div(phirb,gamma) stands for ...
Forum: OpenFOAM Running, Solving & CFD May 11, 2008, 08:34
Replies: 59
Views: 5,340
Posted By sega
Hey. I send the files to yo

Hey.

I send the files to your account.
For all the other people who want to toy around with this problem: Here are the files attached:
...
Forum: OpenFOAM Running, Solving & CFD May 11, 2008, 08:31
Replies: 59
Views: 5,340
Posted By sega
Hey. I send the files to yo

Hey.

I send the files to your account.
For all the other people who want to toy around with this problem: Here are the files attached:
Showing results 1 to 25 of 37
Page 1 of 2 1 2

 
Forum Jump

All times are GMT -4. The time now is 20:08.

Contact Us - CFD Online - Privacy Statement - Top