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Search took 0.00 seconds. Search: Posts Made By: hitzhwan
Forum: FLUENT February 26, 2020, 16:55
Replies: 49
Views: 30,772
Posted By hitzhwan
When the fluent runs, it abruptly give the errors below, and I cannot run afterwards,

When the fluent runs, it abruptly give the errors below, and I cannot run afterwards, what's the reason?
Forum: FLUENT February 26, 2020, 11:04
Replies: 49
Views: 30,772
Posted By hitzhwan
I have used the Eulerian Wall Film Model.

I have used the Eulerian Wall Film Model.
Forum: FLUENT February 26, 2020, 10:54
Replies: 49
Views: 30,772
Posted By hitzhwan
Error: CAR: invalid argument [1]: wrong type [not a pair] Error Object: 0.

When I simulate the falling film flow, I use the lee model in-code, but it give the down errors, can you tell me why?


Error: CAR: invalid argument [1]: wrong type [not a pair]
Error Object: 0.
Forum: FLUENT February 26, 2020, 10:52
Replies: 49
Views: 30,772
Posted By hitzhwan
The UDF is directly downloaded from the fluent help, it is not edited by me, can you

The UDF is directly downloaded from the fluent help, it is not edited by me, can you see what's wrong?(see attachment)
Forum: FLUENT February 25, 2020, 17:26
Replies: 49
Views: 30,772
Posted By hitzhwan
The laminar model is used in my simulation, the y+ cannot be checked.

The laminar model is used in my simulation, the y+ cannot be checked. And mesh number is higher than that in the paper, so I think it can not solve the problem by refining it.
Forum: FLUENT February 25, 2020, 10:28
Replies: 49
Views: 30,772
Posted By hitzhwan
But it cannot solve the ununiform mesh size at some points of the circumference by re

But it cannot solve the ununiform mesh size at some points of the circumference by refining the first cell, it always has that phenomenon.
Forum: FLUENT February 24, 2020, 23:00
Replies: 49
Views: 30,772
Posted By hitzhwan
Thank you for sending me[/QUOTE]

Does anyone have this file?

Collection efficiency calculation and running wet and runback
analysis on wing



Copy the files, (NACA_0012.msh, film_accretion.c) to the working folder.
Forum: FLUENT February 24, 2020, 16:34
Replies: 49
Views: 30,772
Posted By hitzhwan
You mean it is reasonable for this phenomenon, I can not understand, but I find that

You mean it is reasonable for this phenomenon, I can not understand, but I find that the mesh in the article have not the phenomenon, why?
Forum: FLUENT February 24, 2020, 11:54
Replies: 49
Views: 30,772
Posted By hitzhwan
Do you know why the mesh is not uniform(see the attachment) around the tube surface?

Do you know why the mesh is not uniform(see the attachment) around the tube surface?
Forum: FLUENT February 24, 2020, 11:39
Replies: 49
Views: 30,772
Posted By hitzhwan
Yes, I have found that when my first cell size is 0.06 mm, it will make the timestep

Yes, I have found that when my first cell size is 0.06 mm, it will make the timestep at 1e-6 for me, which will take a long time to calculate. Do you know how to choose a mesh size for the first cell...
Forum: FLUENT February 24, 2020, 11:20
Replies: 49
Views: 30,772
Posted By hitzhwan
I have a question, if some positions have film thickness higher than 1 mm, but some

I have a question, if some positions have film thickness higher than 1 mm, but some lower than 1mm, which option should I choose? In addition, why can not use the VOF at film thickness lower than...
Forum: FLUENT February 24, 2020, 11:12
Replies: 49
Views: 30,772
Posted By hitzhwan
Could you give me an example for using the EWF. I do not know how to use it?

Could you give me an example for using the EWF. I do not know how to use it?
Forum: FLUENT February 24, 2020, 11:04
Replies: 49
Views: 30,772
Posted By hitzhwan
Do you think the compressive option can capture the film surface accuracy ? Have you

Do you think the compressive option can capture the film surface accuracy ? Have you use the option in simulation falling film?
Forum: FLUENT February 24, 2020, 10:55
Replies: 49
Views: 30,772
Posted By hitzhwan
But we I choose the implicit VOF capturing, there is no CSCSAM option for the volume

But we I choose the implicit VOF capturing, there is no CSCSAM option for the volume fraction, there are only "compressive" and "modified HRIC" optiions. Only I use explicit VOF capturing can I...
Forum: FLUENT February 24, 2020, 10:40
Replies: 49
Views: 30,772
Posted By hitzhwan
Does the "implicit VOF" means the transient...

Does the "implicit VOF" means the transient formulation is implicit?
Forum: FLUENT February 23, 2020, 11:45
Replies: 49
Views: 30,772
Posted By hitzhwan
Answer question

(1)Because only use the explicit VOF can I use the Geo-reconstruct scheme for the volume fraction equation.
(2)I do not know how I can use a Eulerian Wall film model, can you tell me how I can set...
Forum: FLUENT February 22, 2020, 12:05
Replies: 49
Views: 30,772
Posted By hitzhwan
Do you have email, I can send you a file.

Do you have email, I can send you a file.
Forum: FLUENT February 22, 2020, 11:51
Replies: 49
Views: 30,772
Posted By hitzhwan
Your timestep is too small, how long does it take to calculate a case?

Your timestep is too small, how long does it take to calculate a case?
Forum: FLUENT February 22, 2020, 11:18
Replies: 49
Views: 30,772
Posted By hitzhwan
Now I am doing some simulation on the falling...

Now I am doing some simulation on the falling film. If I choose the variable timestep, and set the fixed courant number =0.5, the real timestep will decrease to 1e-6, which will take a long time to...
Forum: FLUENT February 20, 2020, 22:35
Replies: 49
Views: 30,772
Posted By hitzhwan
But I see many papers use the second-order discretization scheme in the explicit VOF

But I see many papers use the second-order discretization scheme in the explicit VOF
Forum: FLUENT February 17, 2020, 11:56
Replies: 49
Views: 30,772
Posted By hitzhwan
I find that when I tried it, it given the errors belew: Warning: Second order time di

I find that when I tried it, it given the errors belew:
Warning: Second order time discretization not available with explicit VOF.
Switching to first order time discretization.
Forum: FLUENT February 17, 2020, 11:54
Replies: 49
Views: 30,772
Posted By hitzhwan
Warning: Second order time discretization not available with explicit VOF.

I find that when I tried it, it given the errors belew:
Warning: Second order time discretization not available with explicit VOF.
Switching to first order time discretization.
Forum: FLUENT February 17, 2020, 11:52
Replies: 49
Views: 30,772
Posted By hitzhwan
Thank you. Can you tell me how to set the...

Thank you. Can you tell me how to set the "Bounded Second Order Transient scheme"?
Forum: FLUENT February 17, 2020, 11:34
Replies: 49
Views: 30,772
Posted By hitzhwan
But it will take a long time to calculate it .

But it will take a long time to calculate it .
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