Great video Sir i used the length of pipe is 25m I faced problems . When i completed the calculations The core annular flow regime was destroy after 4m From the beggining And the color gradient didnot continue to the end of the pipe . after 14m the color becomes only red If you have any account on social media please send it to me I want to show you my results
That is an excellent explanation. Many thanks for ur work. May i ask a question. Im working on designing a heat exchanger that heats the R345fa with waste heat of exhaust gas of gasoline engine. In this case R245FA enters the heat exchanger tube in liquid phase and must exit in gas form as usual. My question is should i use multiphase flow analysis for monitoring liquid and vapor phase of R245FA. If u could answer my question i will be very happy with u.
@Ansys-Tutor, nice tutorial. Could you please explain why you set the initial oil (core fluid) fraction to zero and make water (outer fluid) fill the pipe?
Why when I was doing the sweep mesh method it failed? I checked the sweepable bodies and apparently no single sweepable body was there. Also, when setting the sweep mesh method, I couldn't find "Algorithm" setting.
I want to learn about the models in ansys! Can you help me? How should i do it on my own? I have seem like 30-40 videos of your channel i can do certain simulations but i need understanding of the work behind it.
First, thank you so much for the video I need your help, I didn't find algorithm in my program (ansys R17.2) so the meshing wasn't like your's when I click on generate mesh.
sir your version of ansys is higher, recording is not working in previous versions. plese tell to select plane and record animation in previous version 2019 also.
could you plz recommend me a book explains the computational methods for two phase flow and how it's solution step by step ?! because i need write a code for two phase core annular flow.... thanks for your effort
It depends on for how much time you want to simulate. If you want a simulation for 6 seconds you can take no of time steps as 600 and time step size =0.01 so 600×0.01sec =6 sec.
Is it possible to simulate single screw extrusion in Fluent? the rotation of the screw drive the polymer inside...I just started learning... thanks to your videos...
@@AnsysTutor I figured out why my result is so much different than yours. The issue is the mesh. When you use the Sweep method, there is a large change in cell sizes near the water inlet (Ten cells in the radial direction at the water inlet are reduced to one cell). This large change causes flow instability which leads to the wavy interfaces seen in your video. I doubt this is realistic. The result is interesting, looks nice, but in my opinion, it is also misleading. When you generate the mesh, if you change the method to Multizone, you will have complete different results, not wavy interfaces, but two nearly horizontal lines.
Its just a tutorial demonstration. If you are working on such programs its highly recommend to do a grid dependency study and select the appropriate mesh.
Thanks for the video, it's useful. I have a question for the time step that you set, did you calculate it?. And I can see that you don't simulate steady part is it optional or not?. Thanks could you helpe me, please?
Time step size is the user input it need not be calculated, it depends upon you how much accuracy you want if you want more accuracy you can decrease the time step size further. This problem need the observation of how does the two different fluid flows in a single pipe, such type of realistic problem should be done using transient simulation.
@@AnsysTutor Sir, - If I have two inlets one for each fluid (T junction geometry), the oil is laminar and water is trubulent, what is the recomendation to configure this condition without using UDF? - Is it convenient setting the boundary conditions for each phase in one inlet due to simplify the geometry or not? Thanks in advance
After insert Method,When "Generate mesh" ,something wrong occur :"The axisymmetric sweeper cannot be used for the geometry. Try using a different method". How ca n I solve this problem,Thank you
Thanks a lot Sir, nice video. I would like to run CAF on a 2D pipe, I set the geometry properties on a project schematic to 2D, but proceed like your video on Design Modler. when comes to meshing I had an error message " No valid Bodies found for 2D Analysis..). Is it not possible to run 2D analysis on a 3D geometry? Thanks
Thank you for the tutorial, i have one question regarding the initialization setting, why did you chose to initialize from all zones rather than from one of the inlets with crude oil volume fraction set to 0 ? both ways from inlet or all zone could set the whole domain filled only with water (when setting crude volume fraction to 0 ) ?
It does not matter, you can initialize from anyzone. While initializing you can set the initial volume fractions as shown in the standard initialisation table.
First of all thanks for the great content! I have a question about the animation results. Shouldn't water's density make the oil go up as it gets closer to the outlet? Are the two fluids mixing in the pipe or the two inlets make it so they never mix? Thanks in advance!
If it is hot crude oil mixed with cold water, how can I set the heat transfer coefficient in the VOF model? I can't find the "Heat" menu under the "Phase Interaction" of VOF model. Or should I use the Eulerian model?
Nice video. Can you please make a video on how to animate flow in vibrating bodies. I will use that concept in human inhalation analysis. When humans inhale air their body expands and squeezes, can you explain how can I do that?
sir, you got me confused in every moves. why don't you explain what are u doing, instead of just re-reading what you are clicking. like "what does this mean, why do we do this, what will happen if we don't do this, etc" i don't want to end up as a "i don't know, it's been already like that from the beginning, why should i know how does it work" kind of person. i beg on this channel. i self learn by your videos. my campus doesn't teach me anything. i don't know if u will reply. but i wanna thank u for making this contents. still, i learn new things tho. thanks
Sorry Daniel, we have mostly explained everything in most of our old videos hope you might get something from that. Its not possible to explain everything in one video. If you have still doubt in any step of any process then please free to ask. I will try to reply if its as per my knowledge. You can also refer to Ansys fluent user guide to get more details regarding the process the physics behind it , equations involved etc.
@@AnsysTutor ohh. i'm sorry then. i've just subscribed you since about 3 days ago. and you recommended me to visit this playlist as the beginner guide. i didn't know that you have videos that already explain the fundamentals in previous videos... So that means i have to watch your previous videos also? What is the name of the playlist? Thanks for replying, sorry i'm very new in Ansys :(
Thanks!
You are most welcome.
LOVE your videos mate !!
Thank you.
Thanks indeed ,
Very well done.
We would appreciate it if the video explained the slug flow case.
Thank you. Whould try to make a tutorial.
An excellent simulation.
Thank you.
thankyou very much sir, it's very helped me on my final project
I like the way of teaching....Hi sir I have small doubt regarding my final year project can you make video on Centrifugal castings simulation
Its similar to this ruclips.net/video/S3BnSfrabeI/видео.html
i follow all your instruciton but rend up getting:
Error: floating point exception
Error Object: #f
when I run simulation
Reset the setup and try once with gravity off.
Error: display-object: No rendering surfaces have been set ! how to slove thıs error
You need to select the surface before you start the animation.
What if I have only crude oil running through the pipe and wall thickness is very small
Wall thickness does not matter a lot unless you add roughness modeling to it.
@@AnsysTutor I will try modelling it. Thank you.
Nice videos for learning Can you please post some transient simulation for axial fans
Thanks for the suggestions. I would try to make such tutorials.
Great video
Sir i used the length of pipe is 25m
I faced problems .
When i completed the calculations
The core annular flow regime was destroy after 4m
From the beggining
And the color gradient didnot continue to the end of the pipe .
after 14m the color becomes only red
If you have any account on social media please send it to me
I want to show you my results
Generally, this happens due to low quality mesh. You can contact me on ansystutor7@gmail.com
Sir i sent you message on your email
I sent you message on your instagram
That is an excellent explanation. Many thanks for ur work. May i ask a question. Im working on designing a heat exchanger that heats the R345fa with waste heat of exhaust gas of gasoline engine. In this case R245FA enters the heat exchanger tube in liquid phase and must exit in gas form as usual. My question is should i use multiphase flow analysis for monitoring liquid and vapor phase of R245FA. If u could answer my question i will be very happy with u.
Yes, you should use the multiphase model as its a phase change case.
This video was very much helpful, if possible can you please do a short lecture on membrane separation process too.
Pls in setting the multiphase, you use Courant number of 0.25, is it calculated or assumed? Thank you for the marvellous video
Its assumed value.
great tutorial
can you upload a tutorial for three phase flow ( oil, gas and water ) in pipeline ?
Will try to make a tutorial. Thanks
How can I open of higher version file in lower version?
You cant open like that. Only higher versions can open lower version.
@Ansys-Tutor, nice tutorial. Could you please explain why you set the initial oil (core fluid) fraction to zero and make water (outer fluid) fill the pipe?
As per the problem description the initial condition is the pipe is filled with water , so I had initialize as 0 vf .
Thank you. Please do a tutorial on condensation of steam in a cold pipe. I cannot find any video on that. Please do.
I'm using a 2022R2 research version and am not able to split the surface into two parts, could you please guide me?
Reasearch version has only limitations on mesh (no of nodes/ cells) its do not have anything to do with the geometry.
Why when I was doing the sweep mesh method it failed? I checked the sweepable bodies and apparently no single sweepable body was there. Also, when setting the sweep mesh method, I couldn't find "Algorithm" setting.
the algorithm setting is available in latest versions like ANSYS 19 R3 & above.
sweep mesh is applicable if the is only a single geometry body.
Hin thanks again . I am following your video step by step , although I am using Ansys 19.2 I could not find Algorithm option while meshing?
It might not be available in that version try with ansys version 20.
I want to learn about the models in ansys!
Can you help me? How should i do it on my own? I have seem like 30-40 videos of your channel i can do certain simulations but i need understanding of the work behind it.
You need to have some basic understanding of Computational Fluid Dynamics (CFD) . If you want I can recommend you one of the good books on this.
@@AnsysTutor yes please do
Cfd book by Malala seekra is one of the good book for basic CFD understanding.
www.google.com/url?sa=t&source=web&rct=j&url=ftp.demec.ufpr.br/disciplinas/TM702/Versteeg_Malalasekera_2ed.pdf&ved=2ahUKEwjUttaR8ZzqAhXPcn0KHekWACAQFjAAegQIAhAB&usg=AOvVaw2OwZHbpufMcljqVpJh7Iz0
@@AnsysTutor Can i refer this book & understand Heat transfer modeling?
Worth watching!!!And can you explain how can excitation of liquid container be made in Fluent, please.
We have a tutorial on open channel flow, that might be helpful for you.
what exactly does the contour of volume fraction(water) mean? And, are we introducing crude oil in a pipe with water.
First, thank you so much for the video
I need your help, I didn't find algorithm in my program (ansys R17.2) so the meshing wasn't like your's when I click on generate mesh.
That option is only available in version 19 and above. To create the o grid mesh manually, watch this video.
ruclips.net/video/8_osCXZjv_g/видео.html
sir your version of ansys is higher, recording is not working in previous versions. plese tell to select plane and record animation in previous version 2019 also.
could you plz recommend me a book explains the computational methods for two phase flow and how it's solution step by step ?! because i need write a code for two phase core annular flow.... thanks for your effort
You need to go through the fluent user manual to get all about this.
how to make a tapered pipe with 3 different diameters and an angle 30
Use loft tool to make such geometry.
sir, how do we know how many number of time steps to take?
It depends on for how much time you want to simulate. If you want a simulation for 6 seconds you can take no of time steps as 600 and time step size =0.01 so 600×0.01sec =6 sec.
@@AnsysTutor thank you sir
can we captured slug/bubble flow in ansys?
Yes.
@@AnsysTutor can i capture the flow pattern using the similar setup from this tutorial?
yes.
Hi, the version r19.2 haven't the algorithm and o-grind divisions options to the sweep method, I'm not getting it, because it gives me error
Try with latest versions.
Thank you for this wonderful video. Kindly simulate water flowing over the surfaces of ice.
Thanks for your query. Will try to make a tutorial.
Can you pls make a video on how to analyse two water jet impinging eachother.
Nice simulation. Can you please explain what is the difference between explicit and implicit formulation and why we chose explicit?
can we integrate multiphase model with dpm ? as i want to introduce coal in Fluidized bed combustor
Yes, it can be done.
is there any video on improving simulation quality?
Check our tutorial on grid independence test.
ruclips.net/video/D9mVeqflU8g/видео.html
sorry but i mean to say improving animation quality btw thanks for your response its so humble of you :)
You need to change the video quality in fluent results setup. See @16:30 in this video.ruclips.net/video/bQXovY7TiI0/видео.html
got it .. thank youuu so much
Can you please make a video in which same surface is used as inlet and after some time as outlet
That can be made using UDF
Is it possible to simulate single screw extrusion in Fluent? the rotation of the screw drive the polymer inside...I just started learning... thanks to your videos...
you need to do that in ANSYS Polyflow software, ANSYS fluent is most used to study flow & Heat transfer calculations.
the playback of animation showes Not responding ! is there a solution?
Select the video file format as mpeg while setting the animation.
Do you have to use two inlets: one for water and the other for crude oil? Can we just use one inlet for both fluids?
Yes, for that you need to define the volume fraction of each fluent at the inlet.
@@AnsysTutor I figured out why my result is so much different than yours. The issue is the mesh. When you use the Sweep method, there is a large change in cell sizes near the water inlet (Ten cells in the radial direction at the water inlet are reduced to one cell). This large change causes flow instability which leads to the wavy interfaces seen in your video. I doubt this is realistic. The result is interesting, looks nice, but in my opinion, it is also misleading. When you generate the mesh, if you change the method to Multizone, you will have complete different results, not wavy interfaces, but two nearly horizontal lines.
Its just a tutorial demonstration. If you are working on such programs its highly recommend to do a grid dependency study and select the appropriate mesh.
Hello sir,
Great video thank you so much, can you please explain how do I get the velocity and pressure plots.
You need to set a location line first, then use the plot feature to plot the graph.
@@AnsysTutor can u please guide me on how to do this ?
Please make a vedio of direct contact multiple phase analysis on fluent
Did not understand your query properly. It's also a direct contact multiphase flow analysis.
@@AnsysTutor
I want to say that make a tutorial of ansys fluent multiphase
in which 2 fluids mix at different temperatures like water and steam
Do make a video how to improve mash quality of any geometry.
In most of the tutorials I had shown how to improve the mesh.
thank you! does the time step in the lower part of the animation come automatic when you write the animation?
Thanks for the video, it's useful. I have a question for the time step that you set, did you calculate it?. And I can see that you don't simulate steady part is it optional or not?. Thanks could you helpe me, please?
Time step size is the user input it need not be calculated, it depends upon you how much accuracy you want if you want more accuracy you can decrease the time step size further. This problem need the observation of how does the two different fluid flows in a single pipe, such type of realistic problem should be done using transient simulation.
@@AnsysTutor Sir,
- If I have two inlets one for each fluid (T junction geometry), the oil is laminar and water is trubulent, what is the recomendation to configure this condition without using UDF?
- Is it convenient setting the boundary conditions for each phase in one inlet due to simplify the geometry or not?
Thanks in advance
Why my result is different from yours, there is a clear interface between crude oil and water
Can you share the result what you have obtained.
@@AnsysTutor I have posted the results on my channel and look forward to your help
you might be getting any reversed flow warning during solution process. Another thing, have you put Gravity ?
It is a better way to present and the voice really matters
Thank you. It's has been possible because of your suggestions and feedback.
After insert Method,When "Generate mesh" ,something wrong occur :"The axisymmetric sweeper cannot be used for the geometry. Try using a different method". How ca n I solve this problem,Thank you
Have you created the geometry as shown in the tutorial?
@@AnsysTutor yes ,I did as the video showed
Can you share the problem on our telegram group?
@@AnsysTutor Nice ,how can I join your group
@Ansys-Tutor I have the same problem.
Cool video. Where can I find this program to do that?
You can download it for free from ANSYS student portal.
Thanks a lot Sir, nice video. I would like to run CAF on a 2D pipe, I set the geometry properties on a project schematic to 2D, but proceed like your video on Design Modler. when comes to meshing I had an error message " No valid Bodies found for 2D Analysis..). Is it not possible to run 2D analysis on a 3D geometry? Thanks
Thank you for the tutorial, i have one question regarding the initialization setting, why did you chose to initialize from all zones rather than from one of the inlets with crude oil volume fraction set to 0 ? both ways from inlet or all zone could set the whole domain filled only with water (when setting crude volume fraction to 0 ) ?
It does not matter, you can initialize from anyzone. While initializing you can set the initial volume fractions as shown in the standard initialisation table.
@@AnsysTutor thank you
Thank you!
You are welcome.
First of all thanks for the great content!
I have a question about the animation results. Shouldn't water's density make the oil go up as it gets closer to the outlet? Are the two fluids mixing in the pipe or the two inlets make it so they never mix?
Thanks in advance!
Pipe geometry is small and the flow velocity causing that.
I see! Thank you very much
If it is hot crude oil mixed with cold water, how can I set the heat transfer coefficient in the VOF model? I can't find the "Heat" menu under the "Phase Interaction" of VOF model.
Or should I use the Eulerian model?
You need to use patching for that.
Please do tutorial on weir
Will try to make a tutorial.
Nice video. Can you please make a video on how to animate flow in vibrating bodies. I will use that concept in human inhalation analysis. When humans inhale air their body expands and squeezes, can you explain how can I do that?
You need to do non linear structural as well as fluid flow analysis for such type of simulation. Its a two way FSI problem.
@@AnsysTutor Thanks 💓
Nice.please do a free stream heat transfer on surface.
you should try it yourself , if you face any difficulties then send us query on ansystutor7@gmail.com
Large eddy simulation of flow over an ice, include heat transfer to the ice surface. Thanks
Will try to. Thanks
cant get the mpeg file instead gtting ppm files. sir please tell me what to do?
After the solution gets complete, you need to click on read file. It will take some time to create the animation file.
can you share the animation file, my computer keeps crashing
m.facebook.com/story.php?story_fbid=2427234960907918&id=1687280751570013&sfnsn=mo
Which version of ansys is this?
20R1
sir, you got me confused in every moves.
why don't you explain what are u doing, instead of just re-reading what you are clicking.
like "what does this mean, why do we do this, what will happen if we don't do this, etc"
i don't want to end up as a "i don't know, it's been already like that from the beginning, why should i know how does it work" kind of person.
i beg on this channel. i self learn by your videos. my campus doesn't teach me anything.
i don't know if u will reply. but i wanna thank u for making this contents. still, i learn new things tho. thanks
Sorry Daniel, we have mostly explained everything in most of our old videos hope you might get something from that. Its not possible to explain everything in one video. If you have still doubt in any step of any process then please free to ask. I will try to reply if its as per my knowledge. You can also refer to Ansys fluent user guide to get more details regarding the process the physics behind it , equations involved etc.
@@AnsysTutor ohh. i'm sorry then. i've just subscribed you since about 3 days ago. and you recommended me to visit this playlist as the beginner guide.
i didn't know that you have videos that already explain the fundamentals in previous videos... So that means i have to watch your previous videos also? What is the name of the playlist? Thanks for replying, sorry i'm very new in Ansys :(
ruclips.net/p/PLykANdmho34zcPPHJ8NSDl8XeUB70jd1A
Thank you!
You are most welcome.