Streamline help needed! (diagram attached)

dom · April 23, 2012, 03:05

Hi all,

I am currently doing a simulation of jet fan systems in an underground parking lot. The idea is to generate a flow profile. However, this is what I got:

Uploaded with ImageShack.us

The streamline does not 'exit' the fans as predicted and they only stay within the fans themselves. Any idea why this is the case?

Many thanks in advance!

shaoda169 · April 23, 2012, 06:14

Hi,

Did you release the 'particles' from your inlet?

dom · April 23, 2012, 23:21

No I didn't. How do I go about doing that?

Many thanks!

zbyhu · April 23, 2012, 23:33

in the geometry tab you choose start from: and then your inlets
and if the streamlines are too short, you should increase limits in the limits tab

dom · April 24, 2012, 00:35

Thanks for the swift reply zbyhu, I have already selected the inlets, and that results from the diagram was what I got... Any idea where the problem might be?

zbyhu · April 24, 2012, 00:37

It's right there in CFD-Post, when you set choose to set streamlines. On the left.

dom · April 24, 2012, 00:43

I have already done that.. I selected all the inlets, and still the result was the same. Any idea what might be the problem?

zbyhu · April 24, 2012, 00:44

Could you maybe post a higher resolution screenshot? Can't figure much from that one..

dom · April 24, 2012, 00:50

Alright hang on mate, just gotta let it finish rendering (changed a few settings), see if that works..

dom · April 24, 2012, 00:56

Here it is: As you can see, the streamlines don't 'exit' the fan into the environment, which is really bugging me

Uploaded with ImageShack.us

April 23, 2012, 03:05	Streamline help needed! (diagram attached)	#1
dom New Member Dominic Ow Join Date: Apr 2012 Posts: 9 Rep Power: 14	Hi all, I am currently doing a simulation of jet fan systems in an underground parking lot. The idea is to generate a flow profile. However, this is what I got: Uploaded with ImageShack.us The streamline does not 'exit' the fans as predicted and they only stay within the fans themselves. Any idea why this is the case? Many thanks in advance!

April 24, 2012, 00:35		#5
dom New Member Dominic Ow Join Date: Apr 2012 Posts: 9 Rep Power: 14	Thanks for the swift reply zbyhu, I have already selected the inlets, and that results from the diagram was what I got... Any idea where the problem might be? Last edited by dom; April 24, 2012 at 00:41. Reason: typo

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April 23, 2012, 06:14		#2
shaoda169 New Member Join Date: Nov 2009 Posts: 13 Rep Power: 17	Hi, Did you release the 'particles' from your inlet?

April 23, 2012, 23:21		#3
dom New Member Dominic Ow Join Date: Apr 2012 Posts: 9 Rep Power: 14	No I didn't. How do I go about doing that? Many thanks!

April 23, 2012, 23:33		#4
zbyhu New Member Join Date: Apr 2012 Location: Warsaw, Poland Posts: 8 Rep Power: 14	in the geometry tab you choose start from: and then your inlets and if the streamlines are too short, you should increase limits in the limits tab

April 24, 2012, 00:37		#6
zbyhu New Member Join Date: Apr 2012 Location: Warsaw, Poland Posts: 8 Rep Power: 14	It's right there in CFD-Post, when you set choose to set streamlines. On the left.

April 24, 2012, 00:43		#7
dom New Member Dominic Ow Join Date: Apr 2012 Posts: 9 Rep Power: 14	I have already done that.. I selected all the inlets, and still the result was the same. Any idea what might be the problem?

April 24, 2012, 00:44		#8
zbyhu New Member Join Date: Apr 2012 Location: Warsaw, Poland Posts: 8 Rep Power: 14	Could you maybe post a higher resolution screenshot? Can't figure much from that one..

April 24, 2012, 00:50		#9
dom New Member Dominic Ow Join Date: Apr 2012 Posts: 9 Rep Power: 14	Alright hang on mate, just gotta let it finish rendering (changed a few settings), see if that works..

April 24, 2012, 00:56		#10
dom New Member Dominic Ow Join Date: Apr 2012 Posts: 9 Rep Power: 14	Here it is: As you can see, the streamlines don't 'exit' the fan into the environment, which is really bugging me Uploaded with ImageShack.us