ANSYS Fluent Tutorial: Flow and Heat Transfer in a Dimpled Pipe | Corrugated Pipe In ANSYS Fluent
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- เผยแพร่เมื่อ 27 ก.พ. 2018
- In this tutorial, it has been shown that how one can create a dimpled pipe geometry in ANSYS. Flow and heat transfer in a dimpled pipe has been analyzed in this tutorial.
What will you learn from this tutorial?
- How to create a dimpled pipe geometry in ANSYS
- How to mesh a dimpled pipe in ANSYS workbench.
- How to set Boundary conditions for a dimpled pipe geometry.
- How to define Fluid and solid cell zones in ANSYS Fluent.
- How to set the Residuals for convergence.
- How to obtain the post-processing Contour plots in CFD Post Processing.
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Hey man, your channel is the best
Thank you.
Thank you for the example. nice and very well understood
You are welcome.
Thank you for this tutorial on dimple pipe.
I would like to know the thermal performance efficiency (Nu/Nuo)/(f/fo)^(1/3) of this dimple pipe. Will the performance increase?
Thx for this tutorial
most welcome.🙂🙂🙂
Hey It helped a lot
Thanks
How to calculate the nusselt number of dimple pipe, when inner face of pipe will be at constant temperature in laminar case?
Thanks for sharing this tutorial. Its impressive that youre showing from step to step . They were really usefull especially for beginners like me. I have one simple question, I m already draw my dimpled pipe (hollowed) from catia. how i want to set the inlet and the outlet?
you need to fill the inside of the pipe with another part in CATIA for the fluid profile, then only you can define the Inlet and outlet.
@@AnsysTutor thanks for replying me and for the guide. it works! the (fill) in my first model. but for the second model (different geometry) the fill was error. they said cannot heal wound. what does that mean? regards.
select all the faces, and apply fill by cavity option.
I am using ansys 14.0 and couldn't find the 'via system coupling option' in the boundary layer condition.
Very nice
Thank You🥰🥰🥰
Thanx
Thank you
You are welcome.
Am waiting for next example with detailed explanation..
I selute your imagination and example selection..
Yes ,will be uploaded soon.
Why the dimple and pipe wall wasn't clubbed under single selection ?
I like your all videos but am fresher and am interested in CFD Learning, so I need step-by-step explanations..
Please can you atleast 10 tutorials..
Yes , are upcoming videos are on the basics only.
Hi Sir your Tutorial selection is Good but you Should explain the things what you doing next and use of that options and function of that option I mean little bit theory explanations..
Working on it. Will be uploaded soon.
could you please show us how can make validation of the results, and how you can find the initial velocity.
validation of the numerical simulation results generally done by comparison with any experimental or analytical results.
Thanks a lot, I want to ask you about no of iterations what number is the best or I must run it until the converge happen
Every problem dont have a convergence. It depends on the residuals vs iteration plot. If the graph lines are moving downwards then there is a chance of convergence, but if its a constant horizontal line after certain iterations then its not required to run the iterations for several times.
Hi. This is a great tutorial. Any reason why the meshing started with small triangles? I am asking this basically because i am doing an analysis on a tube ( no dimples and in mm) but and my mesh starts with small squares. Is it the units ? Thanks a lot
I did not get you, are you asking about the mesh, why its tetrahedron in shape or what you want to know.
@@AnsysTutor hey, I have figured it out. It is just my default settings that are different from yours.
Thanks for your attention as always.
Thank you a lot for this nice video, in my opinion, I saw some mistakes of you based on my experiences in using Ansys-Fluent: at first, is there necessary to put all the part inside a single part as FORM NEW PART? And the second is about determining BCs for the wall and shadow wall since you inputted two different temperature ie 320 and 310 K, however, in the Fluent manual it has been asserted that considered wall and its shadow must have the same properties and values as well? and the final question for me what is the main differences between local and global temperature distributions in the CFD post you mentioned. I would be appreciated if you could crystallize these points for me. Thanks alot.
Thank you Javad for your question. The reason behind making all the bodies to one part is to create a conformal mesh between all the parts so that there would not be any contact faces , second thing about the shadow wall, yes you are right, the wall and shadow can't be have different tempt it's my mistake, sorry for that, after assigning the shadow tempr as 310k the wall tempr that I had put 320K might be changed to 310k automatically,
In CFD post, global setting means it will consider the maximum & minimum temperature of the total domain which is selected in the analysis, but if you select local , you would get the variation of result on that selected face or region only.
@@AnsysTutor Thank you so much for all of the points you mentioned here. However, I actually, I want to be sure, the best method of defining interfaces in which we could catch the heat transfer between solid and fluid domains. As you mentioned using FORM NEW PART just makes the meshes be conformal between the mutual boundaries, but we must have contact regions in order to define MESH INTERFACES in the FLUENT which causes us to have a dominant control in the solution process! This section i.e. the correct definition of the interfaces made me a little bit confused now! I would be appreciated if you could give more information about this issue. And thanks again for taking the time to the questions.
Sincerely,
Javad
Yes Mesh interfaces are important ,but not in all the cases , you can watch our tutorial on single moving reference frame and multiple moving reference frame in which I had shown how mesh interface plays important role in mesh motion, apart from this there are also some cases in which we want non conformal meshing for better meshing to a single part with out disturbing other part's mesh. Mesh interfaces modeling is an important work if anyone skip this step it might give a totally wrong result. That's why for beginners I always suggest them to make these as one part to get the result.
@@AnsysTutor Thank you for your response. And could you please put the link of the mentioned videos that I could directly have access to them. I am now actually working on the modeling of a NATURALLY VENTILATED DOUBLE SKIN FACADE and now have faced plenty of issues in order to solve the problem. At first, I thought maybe because of the undecent method of defining interfaces my results are not getting closer to the experiments but I saw that was not the problem, so I need some critical help about solving the regarded problem.. If there are videos about the natural ventilation with conjugative heat transfer that consider air as fluid and a transparent solid please inform me. And I am solving in 2D and 3D as well.
Actually, the main problem consists of a cavity with 2 layers of glasses that separated each other by 55 cm distances. In the modeling techniques, I have tried to model just the inside of the cavity as a fluid domain and the constraints are the glasses with thicknesses that I also meshed them. There are 2 openings in the bottom and top of this cavity that air can ingress and egress of it. for the thermal boundary condition, I have considered two types of heat sources for one case by using constant heat flux (714 w/m2) and for the second case I have used DO radiation model and input 715 w/m2 as the heat adding from radiation tap (the tap next to the thermal boundary condition in the FLUENT). At first, I need to know what is best way of defining heat source for this types of problems (i.e catching greenhouse effect inside the cavity especially in 2D environment) I mean order to define a heat source that comes from the sun and increases the cavity air temperature which method is very efficient and more accurate? Thank you so much if you could just give some tips or give your opinion about my utilized strategy.
Bests,
Javad
Instead of using add frozen and boolean, can I just use the fill option to add the fluid domain?
As there are dimple surfaces you might get error in fill option. But you should try ,and check.
how to plot the graph of the outcome when there are two outlets, I mean if the pipe has bifurcation and we have to plot the graph of the outcome at both outlet
For such case, You need to add another data series at the same chart. Go to data series tab and select a new series.
how did the pipe wall shadow and dimple shadow are there in the boundary condition section which part of the pipe they really are?
use highlight zone option in fluent set up to know about the boundary regions you defined.
Thanks for the video. Why there is not sound?
while making the video we have a less experience of video editing skill. Our latest tutorial videos have proper sound. Hope you would like it.
How to change dimple depth by keeping diameter of dimple constant, I mean I want to analyse for depth equal to 2 mm but diameter 5 mm
You need to modify the dimple(sphere) center distance from the center of the cylinder.
why in one shadow wall you gave 310K and in other 320 K, shouldnt they be same? how do you know prehand the temperature of the inner walls?
the parent wall and the shadow wall should have the same value. If you find that is different in the tutorial then that might be a mistake from my side.
Sir in this exact same geometry, I want to apply heat flux on outer wall of the cylinder and observe conduction through the thickness and then heat transfer to the fluid. What should be my Boundary Conditions ? Please help.
your boundary condition should be heat flux . If you know the temperature value you can use temperature Boundary Conditions also.
@@AnsysTutor yea sir I know I have to put heat flux on the outer tube wall but what about tube inner wall and inner wall shadow ?? Would it be coupled or something else since I want to observe conduction through the tube thickness as well.
@@samking618 inner wall and shadow wall both should be coupled , if you want heat conduction between walls.
@@AnsysTutor thanks alot, this worked perfectly fine. Btw can you tell me something about meshing of fluid region of this dimpled pipe ? I want to add inflation and edge sizing. I will be highly thankfull to you.
@@AnsysTutor during edge sizing, even if I select both inlet outlet edges, the edge sizing happens only near the inlet outlet edges and not happening through out the length like it happens in smooth pipe. I hope it is clear to you.
Is it ok to define a cylinder as a fluid domain without extracting dimples from it?
If you want to analysis flow in the dimpled pipe, then you need to create a fluid domain which fills the dimpled space also.
@@AnsysTutor thanks
What would you change if you have pipe with holes instead of dimple pipe?Well obviously geometry and boundary conditions but how could you errange it in Ansys
We are working on such tutorial, the inlet would be on one face of cylinder , then outlet at the middle cylinder face, its a radial inflow problem.
@@AnsysTutor I am looking forward to watch it when it comes out.
Is it possible to perform fire dynamics simulation in fluent?
Yes.
@@AnsysTutor can you publish a simple example related to that. Thank you.
What is the benfit in any engineering design?
such type of pipe would improve the heat transfer rate.
How to prepare a report for this analysis for project
Which report? I did not get you.
What does system coupling do?
system coupling instructs the solver that the domain's BC is similar to the adjacent one.
how to download the plots and results. Please tell me
pipe material and friction factor of pipe what about that
Pipe material has been assigned in the setup. Friction factor should be calculated from the result.
so do the dimples make the volumes of slowest flow neglible compared to a pipe that is not dimpled?
Roughness decreases the flow velocity.
@@AnsysTutor so air velocity in polish pipe much better than air flowi in dimple pipe, correct me if iI`m wrong
beginners spelling is wrong
Thank you :)