ANSYS Fluent Tutorial | Natural Convection Heat Transfer | ANSYS CFD Analysis | Training
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- เผยแพร่เมื่อ 20 ต.ค. 2018
- From this tutorial ,viewers would be able to learn how to create a green house like structure and analyze the natural convection phenomena. This is a very simple tutorial. Meshing the geometry has been properly described in this tutorial. If have any doubt at any stage please feel free to ask.
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wowwww..sirr..it was really help ful..thank you for this impressing video...i honestly was looking for this type of geometry and associated CFD analysis....but when possible, please include a video for forced convection greenhouse dryer with loads, such as grains, fruits...thanks
Thank you. will try to make a tutorial like that.
can you make a tutorial on the sunspace attached building? Or can you help me with this using the solar load model?
Is any video about natural convection single slope solar distiller anaylis?
To model any problem we need to understand the problem first, for that you should provide detailed introduction about the problem and project outline, Boundary conditions, if you have any assumptions and simplifications in this model, Conclusion about your results, Suggestions about how to improve the result.
Thanks!
To add all you just need to give your background voice instead of music. Thanks!
thank you Suraj For you suggestion, we will do these improvements in our upcoming videos.
Dear, good morning, your video is excellent, it really helps me a lot for my college thesis!
I would like please if you could guide me with the following. If I want to evaluate the impact of outside wind on the greenhouse by generating an enclosure or reciento, in that case I must make the external floor to the geometry or how to work that scenario to give a good mallado???? thank you very much
Can you describe a little more about the project, I did not get your query. You can mail me on ansystutor7@gmail.com
where is Heat transfer coefficient for natural convection specified? Thanks
Hello, I'm working with Ansys 19.1 and in the z direction I get equally sized elements, I can see that you get smaller elements at the extrems and bigger at the middle. Can you think why this would be so? Thanks for the videos
you can check the sizing function in details of mesh, then change it to adaptive you might get the same.
BCs from the video- 350 K at bottom wall and side heated wall. Outside wall at 300 K. no H value considered. All are at default settings.
Thanks very much for your video! It's awesome! However, when I tried the same project. When I input mesh to fluent setup there was always error said "The mesh file exporter does not support overlapping geometry in named selections. Please resolve the issue and try again. You can use the option “Show Geometry in Overlapping Named Selections” (when you right click on the Mesh branch of the tree) to help diagnose the problem." Do you have any idea?
you might have given the named selection twice for the same boundary, please check that.
Thanks very much! It worked!
Hi Ansys-Tutor, thanks for your detailed video! I made sure to exactly replicate all of your steps. I use ANSYS 2019 R3. I have one issue - could you suggest a solution? > I obtain a residual plot for energy (same trend as yours), but the x, y, z residuals have the value of zero throughout all iterations. Consequently I do not have any results at the contour plots.
Would be great if you know what's going on!
You might not have changed the air density.
@@AnsysTutor Thank you for the swift reply. However, I already set the air density (in Operating Conditions at the Setup step) to 1.225, so that could not be the mistake?
Yes, that is. Constant density of air cant give you the diffusion effect.
@@AnsysTutor Switching the air to ideal gas gave the desired results. Wonderful!
thanks so much, when apply laminar mixed convection in circular tube, how to set it, I mean boussinesq hypothesis?
You need to define the air as variable density instead of constant density. For this, you need to set the density to incompressible ideal gas so that you would experience the natural convection.
the natural convection is based on the density change duo to change in the temperature so you just say the temp. of aside of the fluid domain is high ?
>>>>
you should specify the air as ( incompressible ideal gas )
you should specify the contact region as a ( coupled wall ) to transfer the heat between solid and fluid
you should simplify the model to decrease the time and the boundary condition
you should but the gravity value to see the natural convection effect ?
best wishes
thank you for your suggestion , we agree with your point , will keep these things in mind in our future uploads.
and also the radiation should be activated
Sir plz provide video on pin fin of automobile cooling system
thanks for the reply,, we will try to do a tutorial on that.
could you make the used drawing available?
It's a very easy geometry you can create on your own.
You did some changes of settings on 25.57 but you didn't show us. Can you please tell me the changes?
I think I had changed the residuals for further iterations.
Hi Ansys-Tutor, I have made a solidwork file of a greenhouse design but when I transferred it into ansys I find it hard to fill my interior to be a fluid domain. Is it possible for me to contact you to clear some doubts ?
Thank you.
Mail me ansystutor7@gmail.com
@@AnsysTutor Omg thank you sir. Will contact you through email. 👍🏼
sir, i am not getting the residual plots of x,y,z velocities and the continuity......it does not show any variations in the residual plot...just the energy is continuously decreasing.....can u plzz guide me here..?
try to check the cellzones conditions.
@@AnsysTutor I am having this same issue. Could you please go into more detail on how to resolve this?
I've made sure I followed your tutorial video exactly. My cell zone conditions look the same as yours. The only thing I changed was "solid_wall" operating conditions. I set Y gravitational acceleration to -9.81 and checked the specified operating density (set to 1.225).
x, y, z velocities, and continuity residuals still aren't being accounted for...
hi miss the basic principle of natural convection . the heat transfer by changing the value of density > so you should change the air property to ideal gas or to in-compressible ideal gas
If you replace music to the either text and voice...it is better
please go through the tutorial if have any doubt in any stage then please feel free to ask.
whether the material thickness is considered for conjugate heat transfer analysis. solid material is aluminum. kindly clarify
.
Yes, material thickness has been considered for heat transfer analysis. Sorry for the late reply.
Can you please suggest me some tutorials on natural convection of pin fins ? ( not forced convection )
th-cam.com/video/XBwDa2YsIeY/w-d-xo.html
I am sorry i forgot to mention 3D.. for 3D pin fin model if there is any tutorial or anything related please suggest me
All the setup processes are similar only difference is the geometry.
@@AnsysTutor thank you..and even though procedure are same(except model)but if there was another video specifically on 3D natural convection pin fin.. It would be great help but that's fine i just need to study that video.
Hi! I appreciate the video but when I open the result section, I am not getting the same results as in this video. Before that everything was okay but results are zero when I ddefine a plane and try to see the temperature or pressure distribution. Can you plz share the files via the google drive link? Asap.
Are you getting any error in results.
@@AnsysTutor Yes, I didn't get the results. I mean the pressure comes zero, temperature comes 350 (constant) etc. there was no variation.
You might have a some interface contact surfaces. How is the iteration vs residual plot.
i need help please 'how to heat oil in receiver'
you need to define Properties of oil, define the Boundary conditions on the wall, like what is the heat input , heat flux or temperature.
@@AnsysTutor thx for your reply!The problem is the result of the simulation do not give me meaning. In experimental result when i the heat oil min 76 deg ce and max 80deg ce. But the simulation give me min 20deg cen max 92 deg cent. This is my headache
I have a question about this case
Yes plz ask .
I changed the density oncce ideal gas and incompressible ideal gas but the residual plots are diffrent from yours
You didn't mention the name of this project....
it is a simple natural convection analysis of a small greenhouse .
18:25 setup
23:00 boundary conditions
26:40 cfd results
Your videos are not informative because you never explain your procedures. Just funny musics on the background :(
I totally agree with you , this video dont have any explanation , we are just a begineer at that time while uploading tutorial videos, based upon our subscribers sugestions and feedback we had improved our tutorial quality , you can watch our latest tutorial videos to find the difference. Thank you for you comment , will eger to hear you if you want any further improvements in our tutorial videos, we will be happy to hear you. Thanks once again.🤝
@@AnsysTutor I am actually a beginner with ANSYS Fluent as well. i am struggling to model maybe you can help. share your email