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Showing results 1 to 18 of 18 Search took 0.00 seconds. Search: Posts Made By: RodriguezFatz

Forum: FLUENT February 13, 2013, 06:46

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz Ok, some thoughts: 1) Do you really need the... Ok, some thoughts: 1) Do you really need the small inlet pipe? This is numerically painful, because the length (and therefore also timescale) of the pipe is much smaller than the one of the tank....

Forum: FLUENT February 11, 2013, 02:55

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz Now, what was the problem? Now, what was the problem?

Forum: FLUENT February 6, 2013, 10:55

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz It looks like some of the residuals nearly don't... It looks like some of the residuals nearly don't change at all during these iterations. This should not happen. What do you use for initialization? There is a button "initialize" at...

Forum: FLUENT February 6, 2013, 10:35

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz This looks bad... How did you initialize your... This looks bad... How did you initialize your domain?

Forum: FLUENT February 6, 2013, 06:52

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz I would: Estimate how far I want to travel the... I would: Estimate how far I want to travel the feed during one timestep. Let's say 0.5m. Now, your time step has to be 0.5m / 20m/s = 0.025s. Then, you set the number of iterations per timestep to...

Forum: FLUENT February 6, 2013, 03:53

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz Yes you can! Yes you can!

Forum: FLUENT February 4, 2013, 09:37

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz Hi, 1) Are you sure about your time step... Hi, 1) Are you sure about your time step size? With 20m/s at the velocity inlet and dt=60s the fluid will move 1200m each timestep! I am afraid that these settings can't converge... Can you show...

Forum: FLUENT February 4, 2013, 04:54

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz I don't see how that helps here. He does not seem... I don't see how that helps here. He does not seem to have a problem with initial values, but with his settings. The pictures at t=0 look like they should... Some setting is wrong. Which...

Forum: FLUENT February 2, 2013, 11:39

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz At the inlet, did you set the volume fraction of... At the inlet, did you set the volume fraction of feed to "1" and all others to 0? Otherwise you will pipe phase 1 as default in, which might be different to feed...

Forum: FLUENT January 31, 2013, 10:22

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz Maybe because your pressure-inlet was defined... Maybe because your pressure-inlet was defined incorrectly.

Forum: FLUENT January 31, 2013, 10:05

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz Ok, if it is vented out, then just use a pressure... Ok, if it is vented out, then just use a pressure outlet for the vent, or leave the top as it is... Now post some pictures after trying again!

Forum: FLUENT January 31, 2013, 09:38

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz What happens to the gas at the top of the real... What happens to the gas at the top of the real tank during filling? Is it compressed? to 2) -> then you have an inlet area of about 0.152m^2. To get your desired 10^m3/s you need an inlet velocity...

Forum: FLUENT January 31, 2013, 09:04

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz 1) Ok. Now, in your last post (picture) you say... 1) Ok. Now, in your last post (picture) you say "this is a closed tank". But it isn't. It is open on the top since you defined it as a pressure outlet. 2) The inlet is just a small half-circle on...

Forum: FLUENT January 31, 2013, 08:25

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz 1) Is this something different to the things we... 1) Is this something different to the things we discussed? I think we were talking about a three-phase flow. 2) Why do you use a pressure inlet? If you know the volume flux, use a velocity inlet and...

Forum: FLUENT January 30, 2013, 05:16

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz Then, pressure outlet for the top should be the... Then, pressure outlet for the top should be the right thing. What happened? BTW: You should set the backflow fraction of the two liquids to zero at the top to ensure that only air flows back from the...

Forum: FLUENT January 30, 2013, 03:37

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz It sounds like that. Where does the... It sounds like that. Where does the second (filling) fluid come from?

Forum: FLUENT January 30, 2013, 02:53

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz Remember: You can not have "nothing" inside a... Remember: You can not have "nothing" inside a volume at any time. Also at t=0 you have to have some kind of fluid above 3m. It sounds like you have to introduce a third fluid (air?) to do what you...

Forum: FLUENT January 30, 2013, 02:14

Replies: 45 How to create a tank which partially filled with fluid? Views: 11,123 Posted By RodriguezFatz Hi, As far as I know, you need to name a body... Hi, As far as I know, you need to name a body in your geometry / meshing tool. In this case you could create the tank with two different bodies - one "upper" and one "lower" body. Now set some named...

Showing results 1 to 18 of 18

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