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-   -   Rev: Can Fluent 6.0.20 predict this problem right? (http://www.cfd-online.com/Forums/fluent/31038-rev-can-fluent-6-0-20-predict-problem-right.html)

Yazid Bindar March 5, 2003 09:09

Rev: Can Fluent 6.0.20 predict this problem right?
 
Dear All Fluent Users?

I would like to invite the Fluent Users to run the following 2D problem on FLUENT 6.0.20 (6's). After you get the result, you post it your comment in this user discussion group or you and me can discuss it personally. Here is the problem?

|--------------------------------| | f | d| | g |--------------------------------|--------------| b| | | |--------------------------------|--------------| a| | | |--------------------------------|--------------| c| | | |--------------------------------|--------------| e| | | | |--------------------------------|

Lengths of edges

a = 0.1 m (Inlet 1): Velocity Inlet

b = 0.15 m (Inlet 2): Velocity Inlet

c = 0.15 m (Inlet 3) : Velocity Inlet

f = 12 m (wall edges)

g = 3 m (wall edges)

d = 0.96 m (wall edges)

e = 0.96 m (wall edges) Boundry conditions

U (Inlet 1) = 17 m/s (normal to the edge)

U (Inlet 2) = 2 m/s (normal to the edge)

U (Inlet 3) = 2 m/s (normal to the edge)

Models: Flows only with Standard k & epsilon

I used turbulent kinetic energi intensity 6 % and hydrodimanic diameter (0.1 m, 0.15 m and 0.15 m)

I run it and I got the solution. I would like you to try it and we discuss the result. PLEASE DO IT with FLUENT 6. I did it with Fluent 6.0.20.

Good Luck

Yazid Bindar Chemical Engineering Dept., ITB, Bandung, Indonesia


Yazid Bindar March 5, 2003 09:16

Re: Rev: Can Fluent 6.0.20 predict this problem ri
 
Dear All

I am very sorry, the geometry description does not appear right as I type it using the post message window. I do not know how to make it right.

Yazid Bindar

ff March 5, 2003 10:47

Re: Rev: Can Fluent 6.0.20 predict this problem ri
 
Why don't you try solve problem with your fluent support.

Regards, ff

Murali March 5, 2003 13:57

To paste a text figure
 
<font face = "courier new">Yazid:

the way to produce the text here as you have it in the diagram is to add the html tag "pre". DO this:

(1) Type <*pre> (without the star)
(2) Copy paste your figure in this text box
(3) Type <*/pre> (wihtout the star) followed by the figure.

The figure would appear as you wanted. Eg:



* *
* *
**



Murali </font>

Yazid Bindar March 5, 2003 22:06

Re: Rev: Can Fluent 6.0.20 predict this problem ri
 
Dear Mr. FF

I got the results already. The results can be questioned and said to be "wrong'?

Regard Yazid Bindar

ff March 6, 2003 04:09

Re: Rev: Can Fluent 6.0.20 predict this problem ri
 
Hi,

Did you try double precison 2D software.

Is your mesh fine enough in high gradients regions.

Check Report->Reference Values... for Depth and then corect your hydraulic diameter in velocity inlet panel.

From your post I cant't see model geometry but for mixing two fluid streams of diferent velocities maybe mixing length turbulece model will give beter results.

Hope this will corect results.

Regards, ff


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