Thank you so so much, this is helpful. However, my volume fraction discretizations does not have second order upwind option. Only Modified HRIC, CICSAM etc.
Thanks a lot for such a wonderful video. If possible can you post a video on Wick-less Heat Pipe (Thermosyphon) operation which includes evaporation and condensation phenomenon....
The tutorial is very nice, but I don’t get the same results. The water is just flowing down the pipe without forming on the wall or even a separation on the water jet. Any ideas how to fix that?
Do you have any recommendations for an improvement? I used the same Parameters like you. Unusually the number of nodes and elements is lower than yours.
I solved my problem changing the interface modeling. With the „sharp“ mode I get the same results. Do you know how to be sure that this mode shows the reality? Why isnt ist sharp/dispersed?
Hi. I have problem with generating the mesh. it says "The axisymmetric sweeper may noy associate mesh to all edges and vertices. Check any relevant loads and boundary conditions that may affected". I am using ansys version 2020 R2 Academic. I also had the line body suppresed. Please Help..Thanks
I find out that changing the inclination angle from 150 to 135 will solve the problem, as you did in the video. I thought it was optional. I have no idea why the inclination angle could affect the axisymmetric meshing. Any idea about this?
I am running ANSYS 18.1 and in post processing under variable option water volume fraction is not showing. What should I do? Only water liquid density option is showing. Help me as I am doing CFD for the first time.
I keep getting the error "The axisymmetric sweeper cannot be used for the geometry. Try using a different method." when trying to generate mesh I'm using ansys 2021 R1 student version
sir i am not able to generate mesh because this message is popping up, "The axisymmetric sweeper may not associate mesh to all edges and vertices. Check any relevant loads and boundary conditions that may be affected." please help
What should i change if i want 2 different gas enter at inlet of a pipeline at the same time with one is enters with bigger fraction from another gas. Btw nice video.
@@AnsysTutorSorry again. I want to ask if i want a fixed inlet pressure and pressure drop along a pipeline. lets say i want 0.5 psi (3447.38 Pa) at inlet, what should i do because when i change the operating pressure, the outlet became 0.5 psi and not the inlet. Thanks in advance.
At 18:36, your screen shows a different time which is 0.344 sec, differs with in your previous set parameter 600 steps 0.0001 sec per step, so finally we get different contours with yours. Can you tell us the real parameters of your showed results?
Prof, i can not apply sweep method to my geometry, an error occur when i try to apply program controlled sweep method. There is no Algorithm option in my "Details of Sweep Method". How can i solve the problem ?
Great video. I hope you can help me. Can u make a video 2D pipe, water and ash, diameter 42 mm, velocity 1m/s or more, and to see total pressure. I've got problems, can't get pressure drop like I should. Thanks for your all videos :)
Thanks 4 your amazing cfd tutorial videos My question is What will be the gravity input if we reverse the flow direction, I mean the flow from bottom to up, will be 9.81 or still - 9.81 ?
Hello! Thank you for the great video. I am trying to set up a two phase inlet boundary condition. 70% of the time fluid 1/ phase 1 and 30% of the time fluid 2/ phase 2 flow out of the inlet. How can I setup this time dependent inlet BC?
Thank you for the video! I have suppressed the line body but it's still have an error " the axisymmetric sweeper cannot be used for the geometry", how can i fix it in ansys 2020R2？
Would you talk about triple phase. Water, air particle. I assume it should be a multiphase with air being a primary phase, water being a secondary phase and dpm on. Is that right?
Ansys-Tutor No, I don't. It is free service. But after that, calculation completed, but result is different with you. Thank you for your nice explaination!
If I have pipe which is divided into two pieces one is water the other is air , is there any additional steps in modelling ? I'm afraid of the interaction between two pieces any tutorials?
I ran the interpretation the same way as the tutorial video over 3 times, but the result is different . The fluid flows and does not form on the wall, but results in just an elongated stream of water. Could you please take a look at my results?(I checked all about you have commented above!😂)
I followed the instructions in the tutorial, but the results are different. The difference is that my result is just the form of air draining out, and water does not form on the wall in the form of drops. What is the problem?
Thanks for this helpful tutorial. I always see the recommendations to use PISO in transient simulations. However, it diverges and the SIMPLE scheme gives better results. Any idea about this?
Hello, if one needs to increase the number of iterations per time steps past the recommendation of 20, say, 150 iterations per time step, does that imply that there's a problem with the model? Or it's just hard to converge?
Sir, The following error is shown while doing meshing with sweep method "The following non sweepable bodies have force sweep method controls and cannot be swept". Any idea Sir? I am using Fluent 15.0 (Window 10/ i7 processor)
@@AnsysTutor I did that but the results are the same. In 15.0 ver., I couldn't get the Algorithm and O-grid division option. Is the problem occurred due to these ?
i think you made it wrong . in initilazition you made water volume fraction as 0 it just helps for iteration time . you need to patch the zones which you want to fill at begin.
Patching has a different purpose it cant be used everywhere, i might have used patching if its filled with fluid already. As its an empty pipe , we need to use volume fraction method to instruct the solver regarding the fluid.
![[CFD] Eulerian Multi-Phase Modelling](http://i.ytimg.com/vi/6BJauDTpCmo/mqdefault.jpg)
I have seen no one dislike this video because only wise man understand what you teach and they are here to learn . I love your video
Thank you.
Thank you so so much, this is helpful. However, my volume fraction discretizations does not have second order upwind option. Only Modified HRIC, CICSAM etc.
which method are you using.
@@AnsysTutor same as yours.
Requesting for a video tutorial of condensation of water vapour
Will try to make a tutorial on this. Thank you.
I don’t have any method option at 16:19 where you used YZ plane. Instead of that, I have options, sample density,points etc. I am using Fuent 2019 R3
If you are using older version then you need to put coodinates of any 3 points on that plane to create the new reference plane.
@@AnsysTutor what coordinates we have to takee can u please tell
Please do a tutorial on grooved wick Copper heat pipe
Thanks for the request, Will try to make a tutorial.
Excellent tutorial. It's really helpful and educational.
Thank you.
D o you rnow how to model a two-phase flow ( oil and solides particles) in a inclined cylindrical tube.
You need to use DPM for this. In that you can define the particle diameter etc.
@@AnsysTutor can you show me please how we use DPN.
can i ask you why my volume fraction for water vanishing, my simulation is wtaer came out of circular orifice entering open channel...than you
Semd the results to us. Let us check the issue. ansystutor7@gmail.com
Thanks a lot for such a wonderful video. If possible can you post a video on Wick-less Heat Pipe (Thermosyphon) operation which includes evaporation and condensation phenomenon....
Will try to make a tutorial if possible. If you have any research paper in that then please send us on ansystutor7@gmail.com
Thanks for such a helpful video. Any suggestion on how to model a water droplet on a rigid surface?
Use patching to denote the droplet .
Thank you for the tutorial. Could you please make a video on DPM/ coughing simulation?
Will try to make a tutorial if possible.
The tutorial is very nice, but I don’t get the same results. The water is just flowing down the pipe without forming on the wall or even a separation on the water jet. Any ideas how to fix that?
Try to improve the mesh.
Do you have any recommendations for an improvement? I used the same Parameters like you. Unusually the number of nodes and elements is lower than yours.
I solved my problem changing the interface modeling. With the „sharp“ mode I get the same results. Do you know how to be sure that this mode shows the reality? Why isnt ist sharp/dispersed?
Hi. I have problem with generating the mesh. it says "The axisymmetric sweeper may noy associate mesh to all edges and vertices. Check any relevant loads and boundary conditions that may affected". I am using ansys version 2020 R2 Academic. I also had the line body suppresed. Please Help..Thanks
I find out that changing the inclination angle from 150 to 135 will solve the problem, as you did in the video. I thought it was optional. I have no idea why the inclination angle could affect the axisymmetric meshing. Any idea about this?
Its due to software glitch. You can create a new geometery with the same inclination ,it would work .
I cant see algorthm, can you help me? 06:34 (I have r19.2 version)
Algorithm option is a new option added in the latest versions like Ansys 19 R3 & 20R1
Understood. Thanks you for that your videos. They help me a lot of things to learn. I hope you not stop . Best wishes. :)
Thank you.
I am running ANSYS 18.1 and in post processing under variable option water volume fraction is not showing. What should I do?
Only water liquid density option is showing. Help me as I am doing CFD for the first time.
Have you defined the various phases
@@AnsysTutor yes i have defined them
@@AnsysTutor can you provide any contact information for me to consult you? My email id is - mishra.shashank54@gmail.com
I keep getting the error "The axisymmetric sweeper cannot be used for the geometry. Try using a different method."
when trying to generate mesh
I'm using ansys 2021 R1 student version
You need to suppress the line body.
Great job, thanks. Any idea on how to simulate plasma in radio frequency inductively coupled plasma ? Or any related topic ? Will appreciate
Sorry, dont have any idea regarding that.
sir i am not able to generate mesh because this message is popping up, "The axisymmetric sweeper may not associate mesh to all edges and vertices. Check any relevant loads and boundary conditions that may be affected." please help
Suppress the line body. & then mesh.
Thanks. But where does the heat come from so that you have steam? I did not notice you have run the energy model though.
There no steam in this simulation.
A software execution error occurred inside the mesher. The process suffered an unhandled exception or ran out of usable memory.
im having this error
Reset the mesh and again do it.
An excellent tutorial video, love it.
Thank you.
"The axisymmety sweeper cannot be used". It is showing like this. Can you suggest something. How can I proceed forward.
Try to suppress the line body first before meshing it.
how can I calculate the flow velocity on inclined surface as specific location using fluent? wat are the steps?
You need to create a probe point or surface plane at that location.
the axisymmetric sweeper can not create for this geometry, what is the problem
Its only for planner geometry
Sir whenever I try to open ansys fluent I received message "ansys.fluent.cortex cortex not available Exception" what should I do? please guide me
Which version software are you using. & What is the operating system.
Hi, I am reproducing results for turbulent pipe flow from decaying swirl. I have the geometry but can't apply it in ansys. Can you help?
What are the difficulties that you are experiencing.
@@AnsysTutor I sent you an email can you check it?
What should i change if i want 2 different gas enter at inlet of a pipeline at the same time with one is enters with bigger fraction from another gas. Btw nice video.
And another question is can i do it in 2d for the geometry?
You need to put different volume fractions for that.
Yes you can so it in 2D.
@@AnsysTutorSorry again. I want to ask if i want a fixed inlet pressure and pressure drop along a pipeline. lets say i want 0.5 psi (3447.38 Pa) at inlet, what should i do because when i change the operating pressure, the outlet became 0.5 psi and not the inlet. Thanks in advance.
At 18:36, your screen shows a different time which is 0.344 sec, differs with in your previous set parameter 600 steps 0.0001 sec per step, so finally we get different contours with yours. Can you tell us the real parameters of your showed results?
Prof, i can not apply sweep method to my geometry, an error occur when i try to apply program controlled sweep method. There is no Algorithm option in my "Details of Sweep Method". How can i solve the problem ?
You should use latest versions like ANSYS 20 or above.
if i choose steady state, is this still work
It would work, but you would not be able to obtain the simulation video like that shown in the video.
In geometry section there was 2 parts, in meshing how it became one?
(i'm doing my geometry in sw then importing it into ansys)
The second body is the linebody. Which is also there in meshing. But it dont take part in 3D meshing.
Great video. I hope you can help me. Can u make a video 2D pipe, water and ash, diameter 42 mm, velocity 1m/s or more, and to see total pressure. I've got problems, can't get pressure drop like I should. Thanks for your all videos :)
Will try to make a tutorial. Thanks for your query.
Thanks 4 your amazing cfd tutorial videos
My question is
What will be the gravity input if we reverse the flow direction, I mean the flow from bottom to up, will be 9.81 or still - 9.81 ?
It would be still -9.81 as gravity direction is along negative y axis.
Hello can you help me to change angle of blade horizontally 45degree
Hello! Thank you for the great video.
I am trying to set up a two phase inlet boundary condition. 70% of the time fluid 1/ phase 1 and 30% of the time fluid 2/ phase 2 flow out of the inlet. How can I setup this time dependent inlet BC?
You need to create this using an UDF. If you cant do it using UDF then you need to stop the solution in between and switch the Boundary Condition.
Sir I’m unable to see my time steps in timestep selector
It’s shows only final time step
I’m using time step size of 0.01 and 1000 time steps
Can you share the screenshot on our facebook or telegram page.
Thank you for the video!
I have suppressed the line body but it's still have an error " the axisymmetric sweeper cannot be used for the geometry", how can i fix it in ansys 2020R2？
Use the manual method to create the sweep mesh or do automatic meshing.
th-cam.com/video/8_osCXZjv_g/w-d-xo.html
Sir an error occur while meshing. "The axisymmetric sweeper failed to generate a mesh." How to fix it?
Solve using the default meshing. Or reset the meshing.
Would you talk about triple phase. Water, air particle. I assume it should be a multiphase with air being a primary phase, water being a secondary phase and dpm on.
Is that right?
Yes, you are right. Any three distinct phase of material combination can be a three phase analysis.
The error "| gzip -2cf> FFF-1.cas.gz" occurred. How can I solve it?
Check the file name it should not contain any space or special characters. Do you have a valid license.
Ansys-Tutor No, I don't. It is free service. But after that, calculation completed, but result is different with you. Thank you for your nice explaination!
Thank you, for this tutorial. ❤
You are most welcome.
Hi I want help me about cfd and matlab for T-junction pipe...thanks
Please describe a more about this simulation.
@@AnsysTutor studying the property of pétrole and naphtha theoretical, with rough inner surface and pressure loss by ansys fluent
If I have pipe which is divided into two pieces one is water the other is air , is there any additional steps in modelling ? I'm afraid of the interaction between two pieces
any tutorials?
No,need to worry, do it similarly.
what is the creepy sound at 14:28 XD. cool video though
It might be an editing error.
After completion of solution i find a pause and tick beside solution tab. Can you guide me what am i missing.
You might have interrupted the solution.
th-cam.com/video/GsLeh9i-nbI/w-d-xo.html
Can you explain why in the boundary conditions, you gave it a volume fraction = 1, when in the initialization, you gave it = 0?
I ran the interpretation the same way as the tutorial video over 3 times, but the result is different . The fluid flows and does not form on the wall, but results in just an elongated stream of water. Could you please take a look at my results?(I checked all about you have commented above!😂)
Yes please send us the result.
Ansys-Tutor How can I send my result? / dlm2002@naver.com / Would you send a mail to here? I'm going to send result to that mail!!
You can mail us on ansystutor7@gmail.com
@@AnsysTutor Thank you!! I sent mail before 3 hoours !
I am stuck in the same problem. What's the solution you have got? Can anyone help me?
I followed the instructions in the tutorial, but the results are different. The difference is that my result is just the form of air draining out, and water does not form on the wall in the form of drops. What is the problem?
Did you get the flow of water or not. Check the inlet velocity and volume fraction of water at inlet.
@@AnsysTutor Thank you!!
Hello Sir, I also faced the same issue. Checked the inlet velocity, but same issue happened
Thanks for this helpful tutorial. I always see the recommendations to use PISO in transient simulations. However, it diverges and the SIMPLE scheme gives better results. Any idea about this?
Decrease the Time step size and increase the no of iterations per time step. Allow the solver to converge in each time step it might give good result.
@@AnsysTutor Agree! PISO Algorithm is good for two-phase flow...
Hello Sir. Thank you for the video. Which version of ANSYS is this? I have ansys R1 2019. Will it follow the same procedure as shown in this video?
Everything is same, Only in meshing ,you need to select the sweep method only , you might not get the ogrid option in that version.
Hello Can you Help me create "wave tank" by wave channel or UDF?
we have already a tutorial on such topic.
th-cam.com/video/wHDFaUWzYiA/w-d-xo.html
@@AnsysTutor i try to use 2D analyst. However it's wrong. I don't know where I'm wrong! Can you share document with me? Thanks .
Well done 👍🏽, any idea on how to simulate plasma in RF-ICT? Or any related topic ? Will appreciate
Sorry, no idea regarding this.
for outlet dont we need to create a projection just like you did for inlet
Yes you can create, but the requirement for this case is like that.
Sir can you please tell me how vof captures the deposition front between two immisible liquid
You might use DPM modeling for such type of simulation.
Hello, if one needs to increase the number of iterations per time steps past the recommendation of 20, say, 150 iterations per time step, does that imply that there's a problem with the model? Or it's just hard to converge?
It will increase the results accuracy, but it will take a longer time.
@@AnsysTutor much appreciated
sir i am getting AreaAve of water at outlet is zero how
Can we use DPM with Multiphase eulerian modelling
Thank you sir, it is really helpful
Thank you.
Thank you so much it is very helpful
You're welcome!
Sir, The following error is shown while doing meshing with sweep method "The following non sweepable bodies have force sweep method controls and cannot be swept". Any idea Sir? I am using Fluent 15.0 (Window 10/ i7 processor)
You need to suppress the line body created.
@@AnsysTutor I did that but the results are the same.
In 15.0 ver., I couldn't get the Algorithm and O-grid division option. Is the problem occurred due to these ?
The algorithm o grid is a new option available in ver 19R3 & higher versions.
It is not generating axissymetric mesh saying try different method
which version are you using?
@@AnsysTutor ansys student 2020r
Me too I don't have
Good Video, its the same for 2d tube
Yes, it can be made using 2D.
Sir How to download this ansys software free download please help me
th-cam.com/video/E5iE_Klj3A8/w-d-xo.html
i think you made it wrong . in initilazition you made water volume fraction as 0 it just helps for iteration time . you need to patch the zones which you want to fill at begin.
Patching has a different purpose it cant be used everywhere, i might have used patching if its filled with fluid already. As its an empty pipe , we need to use volume fraction method to instruct the solver regarding the fluid.
Thanks a lot.
You are most welcome.
спасибо за видео !
Вы можете быть самыми желанными гостями!
Thank you sir
Most welcome 🙂
ممنون
HI can you let me know how to put a film of water of 0.3mm and remaining air in a channel as boundary condition. Thnaks and regards?
You need to take adapt region option to mark that thickness in the flow domain. Then, patch the desired material on that adapted zone.