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Search: Posts Made By: tfuwa
Forum: OpenFOAM Post-Processing August 14, 2015, 02:31
Replies: 40
Views: 8,783
Posted By tfuwa
Hi Fabian, Thanks for your swift reply on...

Hi Fabian,

Thanks for your swift reply on this. Your method works like a charm.

I hope Tecplot Engineers can see my last message and include the functionality into Tecplot loader (if it is...
Forum: OpenFOAM Post-Processing August 14, 2015, 00:20
Replies: 40
Views: 8,783
Posted By tfuwa
symmTensor in tecplot

Dear Forum,

I found today that tecplot omits symmTensor (for instance, volSymmTensorField) while loading openfoam data. Anybody knows a solution? It is much appreciated.

I am using Tecplot 360...
Forum: OpenFOAM Installation February 3, 2015, 07:47
Replies: 61
Views: 5,900
Posted By tfuwa
Smile llegal instruction

Hi Bernhard,

Sorry for the late reply, but yes, we finally figured out the error is due to that there are login node (one machine) and job node (another machine) on the supercomputer, exactly as...
Forum: OpenFOAM Running, Solving & CFD November 20, 2014, 00:11
Replies: 31
Views: 4,545
Posted By tfuwa
Dear Anton, Thanks for the great tool. ...

Dear Anton,

Thanks for the great tool.

Is it possible to average/integrate a certain parameter over a specific area, say num1<x<num2 & num3<y<num4?
Forum: Tecplot October 21, 2014, 02:38
Replies: 8
Views: 779
Posted By tfuwa
Hi Durrell, I have a time-dependent flow...

Hi Durrell,

I have a time-dependent flow field and managed to plot streaklines. The question is how to plot the pathlines with tecplot for the same flow field? Thank you in advance.
Forum: OpenFOAM Installation October 4, 2014, 21:50
Replies: 61
Views: 5,900
Posted By tfuwa
Hi Bernhard, Thanks for your kind help. With...

Hi Bernhard,

Thanks for your kind help. With steps a) and b), the problem persists.

The OF2.2.2 was compiled by myself. There were some errors popped-out during installation, which never...
Forum: OpenFOAM Installation October 1, 2014, 05:34
Replies: 61
Views: 5,900
Posted By tfuwa
Illegal instruction

Dear Bruno and All,

I got an Illegal instruction message when using groovyBC. Can you please give a hand on this? Thank you.

It seems to me the compiling process is okay. as see bellow for the...
Forum: OpenFOAM Running, Solving & CFD September 30, 2014, 05:46
Replies: 1,158
Views: 79,235
Posted By tfuwa
Hi Niels, Many thanks for your prompt reply....

Hi Niels,

Many thanks for your prompt reply. I am interested in wake pocket as I am planing to simulate extreme waves and in the same time to save computational effort.

I will try to see if I...
Forum: OpenFOAM Running, Solving & CFD September 29, 2014, 22:41
Replies: 1,158
Views: 79,235
Posted By tfuwa
Dear Niels and everyone, Could you please...

Dear Niels and everyone,

Could you please comment on how to build a time-dependent wave input under wave2Foam, such as a wave group or wave pocket as shown bellow? Thank you very much (sorry if...
Forum: Main CFD Forum September 10, 2014, 01:40
Replies: 27
Views: 3,682
Posted By tfuwa
Hi Filippo, Thank you for your promote...

Hi Filippo,

Thank you for your promote reply. That is to say 2-D LES is similar to 2-D RAS? I read through this thread and some people seem to suggest 2-D LES is not mathematically right.

I am...
Forum: OpenFOAM Pre-Processing September 9, 2014, 22:01
Replies: 60
Views: 3,163
Posted By tfuwa
conditional operator

Dear OpenFOAMer,

For groovybc conditional operator (if a is true, then d=b, else d=c)

How to realize this?
Many thanks.
Forum: Main CFD Forum September 1, 2014, 04:18
Replies: 27
Views: 3,682
Posted By tfuwa
Hi All, I have a simple question that why...

Hi All,

I have a simple question that why 2-D les is not physically right?
Forum: OpenFOAM Pre-Processing January 5, 2014, 22:59
Replies: 9
Views: 1,317
Posted By tfuwa
Hi Lore, Many thanks for your answers and...

Hi Lore,

Many thanks for your answers and patience. Now, it works pretty well with freesteam b.c. condition by two inlets and two outlets. Great help.
Forum: OpenFOAM Pre-Processing December 29, 2013, 22:15
Replies: 9
Views: 1,317
Posted By tfuwa
Hi Lore, Could you please elaborate on "two...

Hi Lore,

Could you please elaborate on "two inlets + two outlets"? As there are only four boundaries, how do you set these boundaries + side symmetry?
Forum: OpenFOAM Pre-Processing December 25, 2013, 03:05
Replies: 9
Views: 1,317
Posted By tfuwa
Hi Lore, Thanks for your quick reply. ...

Hi Lore,

Thanks for your quick reply.

Say the computational domain is a rectangular. If the inlet flow is in x direction, then side b.c. (two boundaries parallel to the inlet flow) could be...
Forum: OpenFOAM Pre-Processing December 23, 2013, 22:57
Replies: 9
Views: 1,317
Posted By tfuwa
I understand the thread is quite old, but is...

I understand the thread is quite old, but is there a way to set the b.c. with an angle of attack in OpenFOAM? Much would be appreciated for any answers on this?

Merry Christmas!
Forum: OpenFOAM Running, Solving & CFD October 27, 2013, 11:34
Replies: 3
Views: 726
Posted By tfuwa
Hi Ziad, Just wondering if you have solved...

Hi Ziad,

Just wondering if you have solved this. I am experiencing the same problem. The simulation just blows up at a time long after the it is stable. Can you please share your solution? Many...
Forum: OpenFOAM Running, Solving & CFD August 30, 2013, 10:25
Replies: 1,158
Views: 79,235
Posted By tfuwa
Hi Niels, Many thanks for your detailed...

Hi Niels,

Many thanks for your detailed explanation and instruction.

Have a good weekend.
Forum: OpenFOAM Running, Solving & CFD August 30, 2013, 01:02
Replies: 1,158
Views: 79,235
Posted By tfuwa
internal waves

Hi Niels,

I am trying to simulate internal waves with wave2Foam.The two phases would be phase1 sea water at 20 oC (bottom, nu = 1.056 e-6 m2/s, rho = 1028 kg/m3) and phase 2 fresh...
Forum: OpenFOAM Running, Solving & CFD July 7, 2013, 11:34
Replies: 1
Views: 364
Posted By tfuwa
For second or first order accurate schemes, to what extent, the results are valid?

Hi forum,

I understand it is not the right place to ask this, but I trust the forum more than textbooks :)

I am confused by the numerical schemes in numerical simulations in general. For...
Forum: OpenFOAM April 5, 2013, 06:52
Replies: 70
Views: 12,579
Posted By tfuwa
Hi There, Thank you Amir, for the...

Hi There,

Thank you Amir, for the clarification. I read this for several times and am really confused.

if shear stress= t - (t.n)n is the right definition (and it is), then why "FLUENT and...
Forum: OpenFOAM March 25, 2013, 21:59
Replies: 24
Views: 9,900
Posted By tfuwa
Hi Foamers, Hope this thread is still...

Hi Foamers,

Hope this thread is still active. I would like to set a time-dependent rotating speed, for instance,

t<10, omega=5;
t>10, omega=0;

Is it possible to do this with...
Forum: OpenFOAM Post-Processing March 25, 2013, 11:24
Replies: 13
Views: 1,004
Posted By tfuwa
Hi Bernhard, Thanks. Just let you know the...

Hi Bernhard,

Thanks. Just let you know the wiki-page has been updated to include this usage.

Kind regards,
Albert
Forum: OpenFOAM Post-Processing March 25, 2013, 03:44
Replies: 13
Views: 1,004
Posted By tfuwa
Hi Bernhard, Many thanks for your help. ...

Hi Bernhard,

Many thanks for your help.

The final expression is

p*rho*normal()*area()-rho*nu*snGrad(U)*area() where the first term is due to pressure and the second represents the...
Forum: OpenFOAM Post-Processing March 19, 2013, 10:43
Replies: 13
Views: 1,004
Posted By tfuwa
Thank you, Bernhard, this is exactly what I want....

Thank you, Bernhard, this is exactly what I want.

For pressure force, the expression is simple,

"forces= p*sf()*mag(sf()) ;"But for viscous force,

"forces= rho()*nu*dev(twoSymm(grad(U)))...
Showing results 1 to 25 of 76

 
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