[Tonoy Mondol]

Originally Posted by Repudaman

Please someone upload the mesh file for the heat pipe (2D). I am not able to separate the water and vapor regions and also condenser adibatic and evaporator region.

hello are you going to use udf? or evaporation condensation lee model which is built in

[Repudaman]

Sir I have uploaded the udf posted in this page for 2 d heat pipe evaporation condensation. But the error comes that some step in udf is not define in the command window. Please suggest me what to do in this case. And kindly suggest me that How much watt (heat flux) should be added in the evaporation wall section for evaporation process and on the other hand what should be boundary condition for condenser wall so that vapor converts to the liquid.
Thanks

[Repudaman]

Originally Posted by Tonoy Mondol

hello are you going to use udf? or evaporation condensation lee model which is built in

yes. But the udf uploaded in the post is not working in the fluent.

[ASHU_VED]

Originally Posted by Abdelhamid Kassem

Find attached the UDF i used for my simulation on Ansys 15 and ansys 17 because, ansys 16 doesnot work with me. It has a bug regarding this UDF.

It takes some time and many trials for simulating the HP. My advice is to start with 2D simple case and then introduce complexity with time. You will need to simulate the boiling tutorial to get some experience about this kind of simulations.

For simulating the condensation, you will need to generate fine wall layers for catching the condensation droplets.

For simulating the Heat pipe you can use these useful tutorials:

1-https://www.researchgate.net/profile...g+Tutorial.pdf

2-https://youtu.be/hPeGvczYHMM

3- https://youtu.be/LQ2y0sIXgio

4 -article: CFD modeling of flow and heat transfer in a thermosyphon
Asghar Alizadehdakhel , Masoud Rahimi , Ammar Abdulaziz Alsairafi

5 -article-2:Three-dimensional CFD simulation of geyser
boiling in a two-phase closed thermosyphon - Hussam Jouhara a,c,*, Bandar Fadhl b,c, Luiz C. Wrobel

If anyone have a question please, write it here so every one can see it and i will reply.

Thanks and good luck

hello
i have some doubts
(a) in mesh, what should be done with boundary in fluid region? is there any boundary condition in that region? if possible please upload mesh file.
(b) udf should used alone or with lee model.
i am not getting convergence in continuity. the residual is reaching to e-4 limit.

[qimao]

Originally Posted by Abdelhamid Kassem

Thread closed.

I succeeded in simulation of a 2d heat pipe using fluent 17 VOF multiphase model with hooking UDF with the case.

The UDF didn't work on Ansys 16 due to some bug in the program, so you should use ANSYS 15 or 17 instead.

If someone need help in the simulation, write your email and i will send some good resources.

Hi, Could you please send me details to qimao520521@gmail.com

Thank you

[behnamrha]

hi
i wanna simulate a thermosyphon in lee model.
i need your help.
i have some problem in initialize and mass transfer.
thanks for your atnettion and answer.
email: behnamrha89@gamil.com

[behnamrha]

Hi
i use Lee model .
what is use for these UDF?
and where should i use it ??
thanke you

[linto]

Originally Posted by Abdelhamid Kassem

Find attached the UDF i used for my simulation on Ansys 15 and ansys 17 because, ansys 16 doesnot work with me. It has a bug regarding this UDF.

It takes some time and many trials for simulating the HP. My advice is to start with 2D simple case and then introduce complexity with time. You will need to simulate the boiling tutorial to get some experience about this kind of simulations.

For simulating the condensation, you will need to generate fine wall layers for catching the condensation droplets.

For simulating the Heat pipe you can use these useful tutorials:

1-https://www.researchgate.net/profile...g+Tutorial.pdf

2-https://youtu.be/hPeGvczYHMM

3- https://youtu.be/LQ2y0sIXgio

4 -article: CFD modeling of flow and heat transfer in a thermosyphon
Asghar Alizadehdakhel , Masoud Rahimi , Ammar Abdulaziz Alsairafi

5 -article-2:Three-dimensional CFD simulation of geyser
boiling in a two-phase closed thermosyphon - Hussam Jouhara a,c,*, Bandar Fadhl b,c, Luiz C. Wrobel

If anyone have a question please, write it here so every one can see it and i will reply.

Thanks and good luck

Sir,

I am trying to do CFD analysis of wickless heat pipe. But not able to fill perticular amount of fluid in heatpipe. What command I have to use to fill 10% of volume of water in the heat pipe using fluent? if possible can you share your contact no please..

[linto]

Sir,

I am trying to do CFD analysis of wickless heat pipe. But not able to fill perticular amount of fluid in heatpipe. What command I have to use to fill 10% of volume of water in the heat pipe using fluent? if possible can you share your contact no please..

[Ketan K2]

Originally Posted by Abdelhamid Kassem

Thread closed.

I succeeded in simulation of a 2d heat pipe using fluent 17 VOF multiphase model with hooking UDF with the case.

The UDF didn't work on Ansys 16 due to some bug in the program, so you should use ANSYS 15 or 17 instead.

If someone need help in the simulation, write your email and i will send some good resources.

please mail me the related resourse @ketan.v.warghat@gmail.com

[Wyj]

Does your heat pipe simulation model have porous media?

[Wyj]

Originally Posted by Abdelhamid Kassem

Thread closed.

I succeeded in simulation of a 2d heat pipe using fluent 17 VOF multiphase model with hooking UDF with the case.

The UDF didn't work on Ansys 16 due to some bug in the program, so you should use ANSYS 15 or 17 instead.

If someone need help in the simulation, write your email and i will send some good resources.

Is there a porous medium in your heat pipe model

[mohsensalehi1993]

Refer to this address:

https://fluentcfd.ir/webinar-ansys-fluent/