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Showing results 1 to 20 of 20 Search took 0.00 seconds. Search: Posts Made By: gustavosimiema

Forum: FLUENT August 17, 2015, 08:36

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Hi, I increase the Diameter of the outlet... Hi, I increase the Diameter of the outlet to find the "borders" of my Problem. When I increased, started to happen "reversed flow". It means that for my purpous, this configuration didn´t work...

Forum: FLUENT August 12, 2015, 11:31

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Please see the attachment: The first one is... Please see the attachment: The first one is with 7 holes and the second one with 19 holes. Both in the same conditions. From the pressour contour can be seen that both has negative gauge pressure...

Forum: FLUENT August 12, 2015, 04:18

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Also the viscosity effect is almost negligible,... Also the viscosity effect is almost negligible, so there is not many loss in the pipe, right?

Forum: FLUENT August 12, 2015, 03:51

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema One Thing that I could observe is that the mass... One Thing that I could observe is that the mass flow rate (kg/s) is almost the same in all holles. This can be explained by the fact that is a steady Simulation, flow is fully developed and the...

Forum: FLUENT August 12, 2015, 03:13

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Now I just made a test to see if it works... Now I just made a test to see if it works accordingly. I reduced the outlet from 2mm to 1.5mm. Then I could observe that the mass flow rate was the same because the discharge area reduced but the...

Forum: FLUENT August 12, 2015, 02:54

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema The Outlet BC is pressure outlet = 0 Pa.... The Outlet BC is pressure outlet = 0 Pa. Operating pressure = 1Pa. You are right, the pressure difference to drive the flow is 1 Pa. How can I use this expressions? Where are them? Another...

Forum: FLUENT August 11, 2015, 11:10

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema One additional Information, if I increase the... One additional Information, if I increase the velocity inlet this Problem (reverse flow in the outlet) vanish out... What´s the Explanation for that?

Forum: FLUENT August 11, 2015, 08:27

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Hi, I increased the number of holes and... Hi, I increased the number of holes and than my solution doesn´t converge anymore. There are reverse flow in practically all pressure outlets. Each hole I called as one outlet. I have a 500 mm...

Forum: FLUENT August 5, 2015, 07:59

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Just one more question, as the inlet will be... Just one more question, as the inlet will be divided by 4 ... I will use a quarter of my previous model... The inlet velocity (BC) I should also divide by 4, correct?

Forum: FLUENT August 5, 2015, 07:21

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Thank you so much for your answer. But... Thank you so much for your answer. But regarding Benchmark, I don´t have it. There are not so many studies in low pressure gas flow. That makes the development more difficult. And as about your...

Forum: FLUENT August 5, 2015, 06:10

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Hi Fresty, After the Simulation with 2... Hi Fresty, After the Simulation with 2 millions I got different results from flow rate. Is still nearly symmetric, but the flow rate in the middle is increasing in comparison with the sides. It´s...

Forum: FLUENT August 4, 2015, 07:30

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Thank you... I will do that... Just one... Thank you... I will do that... Just one question regarding vector plot Animation (if you know). I tried to animate the vector plot in the YZ plane. Basically it starts with the gas getting into...

Forum: FLUENT August 4, 2015, 06:46

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema It works pretty well... Now it´s much more... It works pretty well... Now it´s much more symmetric. :) What would you suggest in order to study the grid Independence? This Simulation I have run with 1.000.000 elements. Would you say to add...

Forum: FLUENT August 3, 2015, 09:54

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema It´s running now the Simulation... Let´s see... It´s running now the Simulation... Let´s see what will happen :) As it will take a while to finish, tomorrow I post here the result and we can discuss if you have time ok? thank you so much...

Forum: FLUENT August 3, 2015, 09:19

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema I have done a new mesh with hex elements.... I have done a new mesh with hex elements. (attach) I got 4.000.000 elements. What do you think? How should I know if it is symmetric or not? Just visual? Or there is any tool I can use?

Forum: FLUENT August 3, 2015, 08:55

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Do you think Inflation (10 layers) is also a good... Do you think Inflation (10 layers) is also a good idea in the outlets?

Forum: FLUENT August 3, 2015, 08:00

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Yes you are right... I´m having around 10% or 15%... Yes you are right... I´m having around 10% or 15% difference from one Simulation to another increasing the refinement of the mesh. I will try to use face meshing as you mentioned. But when I use...

Forum: FLUENT August 3, 2015, 06:50

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema In attach the mesh I used withh 4.000.000 elemnts. In attach the mesh I used withh 4.000.000 elemnts.

Forum: FLUENT August 3, 2015, 06:40

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Hi, I´m using unstructured mesh and laminar... Hi, I´m using unstructured mesh and laminar model. I don´t know how to do a structured mesh in a 3D square section model. Could you help me? But I have tried with 500.000 / 1.000.000 /...

Forum: FLUENT August 3, 2015, 06:04

Replies: 32 Mass flow Views: 2,832 Posted By gustavosimiema Mass flow Hi, I´m facing a Problem with the flow rate results from my Simulation. I have a gasfeed (both sides closed), square sectional area. The inlet is in the middle on the bottom and I have some...

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