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Search: Posts Made By: zhihuawan
Forum: CFX January 14, 2018, 21:59
Replies: 61
Views: 897
Posted By zhihuawan
udf error

long time no see you,I now meet a problem about udf,can you help me?when I interpret it to the fluent,it gives errors "error:E:fluent/volume.c;line 28:parse error." The udf are as follows:
...
Forum: CFX January 7, 2018, 03:38
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;676876]You are running a free surface simulation with surface tensio

I have tried so many times as you said ,but I failed all the time,I am very depressed ,I just want to abondon,can you help me?I just do not know how to do next?
Forum: CFX January 3, 2018, 20:55
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;676339]1) If you don't have an output file then please attach the CC

60558

when I try to set the timesteps to 1e-6,after a long time ,it will give a error ,the out files are as following:
This run of the CFX Release 18.0 Solver started at 21:39:13 on 03 Jan
...
Forum: CFX December 26, 2017, 22:19
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;676173]In future please just attach the output file. That gives all

(1)As you can see ,because it has debug,so there is no output files,so I just need adjust the solve setting.
(2)What is good adequate convergence,you mean every variables should below the 1e-4,I see...
Forum: CFX December 26, 2017, 09:03
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;676097]You can easily test whether your opinion or my opinion is cor

I have done as you said ,I have choose inlet codition to the laminar flow ,but I met a error after it calculate a few times, this are the error images,I have send the case file to your e-mail, I...
Forum: CFX December 25, 2017, 09:18
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;676040]When the solution goes all over the place (that is, not conve

I have a different opinion to you.I think the reason is not it does not coverge,I the main reason is that you just calculate a few times which has clear water-air interface in the steady flow...
Forum: CFX December 23, 2017, 20:55
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675932]I have just emailed you the file. I have removed the results

fig1 60416


fig2 60417


fig3 60418

This is figures,do you get the same result?
Forum: CFX December 23, 2017, 20:32
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675932]I have just emailed you the file. I have removed the results

I am extraordinary grateful for your sending the file to me, I find you are very intelligent to use the step function to solve the liquid and air inlet in the steady calculation,we can see a clear...
Forum: CFX December 22, 2017, 22:58
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675859]If you say the flow rate is 1kg/s for water, but that is spre

Thank you for your kindness.but I want the the volume of the liquid inlet is 100% ,the volume of the gas inlet is 100%,if I give the mass flow rate ,I cannot set this.My email is...
Forum: CFX December 21, 2017, 21:30
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675846]As water has 1000 times the density of air, if you specify th

What is "off by much",I cannot understand your meaning,the mass flow is neither to the water nor to the air ,I do not know which fluid it will refer to, and I know this setting is wrong ,I want to...
Forum: CFX December 21, 2017, 03:52
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675739]Are you in China? If so then I suspect your government has bl

60351
60352
60353


you can see my model ,in my model ,I choose the gas inlet,liquid inlet and outlet as a periodic interface,but the mass flow is to the all face ,I cannot give it to the liquid...
Forum: CFX December 20, 2017, 20:43
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675739]Are you in China? If so then I suspect your government has bl

Yes,you are right,I am sorry that our country has block the google,I think the only way is to send the screen capture pictures to the CFD online,I know it is very disturbing you,if you are convinent...
Forum: CFX December 20, 2017, 02:57
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675644]I have PM you with a google drive location.[/QUOTE]

I tried for a lot of time,but it just does not work,I wonder if it is my error operation.how large is it ?My e-mail is enough to receive it,my emai is hitzhwan@163.com, you can have a try.is there...
Forum: CFX December 20, 2017, 01:15
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675637]1) It works fine for me. 2) I defined an initial condition by

I am terribly sorry,if you are convinent,you can send your case to me,I will be very grateful, for I cannot understand how to realize it ,thank you very much.
Forum: CFX December 19, 2017, 23:17
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675635]I specified the mass flow rate and used the initial condition

I have two questions,
(1)I know you give the initial condition to define the air/water interface,but after it simulates,the mass flow will fully flow of the inlet in the future(because the air...
Forum: CFX December 19, 2017, 22:08
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675619]I set the total mass flow rate.

You may misunderstand my question, I mean that in the inlet ,there are two phase in,if you give a total mass flow rate,all the phase will be water liquid ,but with no air,this is not what I...
Forum: CFX December 19, 2017, 02:25
Replies: 61
Views: 897
Posted By zhihuawan
Thumbs up Yes,this is what I want,you are great,does your...

Yes,this is what I want,you are great,does your mass flow rate is uniform?how can you set the normal inlet/outlet pair for the air and water volume fraction?can you send me some setting images or...
Forum: CFX December 18, 2017, 21:45
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675486]If you expect this flow to develop waves of varying shape and

If you have read some articles about the wave film ,you may know that the wave film is periodic,in this article the author has said that the length of the model include one wave length,therefore, we...
Forum: CFX December 18, 2017, 08:52
Replies: 61
Views: 897
Posted By zhihuawan
I just want to simlulate the film flow on the...

I just want to simlulate the film flow on the plate,and study the film thickness ,wave characterist,wave frequency,wave velocity characterist of the film with different situlation,such as different...
Forum: CFX December 17, 2017, 09:19
Replies: 61
Views: 897
Posted By zhihuawan
the article information

this is the article ,can you see that,if you want ,I can send to you,but I do not know how to send it to you.
Forum: CFX December 17, 2017, 09:11
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675354]If I understand correctly, you are only interested in the ful

Yes ,you are right,I want to study the fully developed flow,and my purpose is to verify the model in the article(in the image),in the article ,the author has use this method to simulate the falling...
Forum: CFX December 17, 2017, 09:09
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675354]If I understand correctly, you are only interested in the ful

Yes ,you are right,I want to study the fully developed flow,and my purpose is to verify the model in the article(in the image),in the article ,the author has use this method to simulate the falling...
Forum: CFX December 17, 2017, 02:40
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675346]If you are defining the mass flow then the translational peri

You may not see that I say the purpose to set the periodic condition is to decrease the computer length of the channel ,or else it will take a long time to calculate,which I cannot bear,do you konw...
Forum: CFX December 16, 2017, 11:00
Replies: 61
Views: 897
Posted By zhihuawan
[QUOTE=ghorrocks;675330]I see no reason why the normal, default translational periodi

I know it can work,but the translational periodic boundary default give a constant mss flow condition,but in this matter,I need a mass flow varying with the position,but I do not how to solve it .I...
Forum: CFX December 15, 2017, 21:43
Replies: 61
Views: 897
Posted By zhihuawan
60255 This is the Nusselt theory velocity for...

60255
This is the Nusselt theory velocity for the liquid film.
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