ANSYS Fluid Structure Interaction tutorial (One Way FSI)
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- เผยแพร่เมื่อ 31 ธ.ค. 2016
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Hello,
Here is a tutorial on performing a FSI in ANSYS. This basically means importing forces from a FLUENT (or CFX) CFD simulation into an FEA simulation in ANSYS Mechanical.
There are not very many clear tutorials on how to do this. In reality, it is actually very simple, however some caution is required when meshing the geometry.
Let me know if you have any questions,
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Nice video Vinay... I am diving into structural now from CFD and it is a good video to begin with
Thanks man!
Great video! Learnt quite a bit.
I'll fire a few questions across soon cause i'm trying it
Amazing stuff!!
Thanks for such an informative video. I am modeling a two-way fluid-solid interaction, a backward-facing step using an oscillating fin to capture its secondary vortices. I want to set v= aw sin(wt) with defined values of a and w and give this velocity to a vertical fin installed in the top wall of this channel. Would you please guide me on how to give oscillating velocity to the fin? (Where should I set this value in Ansys mechanical)
Hi sir, I watched your one-way coupling video. I tried to do one-way coupling using fluent and structure in the workbench. But, in structures not read the fluent result file after coupling. I don't know why could you help me.
Hi,
One-Way Coupled FSI is understood as a situation when solid deformations are negligible and fluid flow affects solid. But are there any One-Way FSI analyses with opposite coupling (solid deformations change fluid flow but fluid flow is not affecting these deformations) ? I think it could happen in case of very slow fluid flow (too slow to cause significant deformations) and prescribed solid displacement (due to inverse piezoelectric effect, for example).
anybody please help me how could I model FSI in Ansys explicit dynamics BLAST LOAD analysis.
explosive tnt eulerian element is unwantedly penetrating to solid Lagrangian element.
It will be useful that you go step by step from the beginning..
Hello Sir, I have CFX steady state result and I want to use the result for doing FSI please guide me.
could you explain only about fluid structure coupling?
How can I simulate the dynamic force applied by the fluid?
I don't mean to simulate a 2 way coupled analysis, but to simulate the imported load with transient structural.
Hi when i couple the CFD solution with the static structural setup it does not load the upstream data
Hi, I am trying to complete this for a model insect wing, using a thin membrane only 0.01mm so I have to use 2D surface shell mesh therefore no volume. How can i complete the model when unable to subtract volume?
I'm doing my project on magnetorheological shear thickening polishing for brittle materials. However, I'm doing simulations with ANSYS software for CFD, and I have obtained satisfactory results. But for solid mechanics, I want to check when cracks and fractures will occur and how the penetration of grits or abrasive particles could impact this. Could you please help me with this?
Thanks for posting such an informative video. I am doing 1 way FSI of Axial Compressor Blade. When I tried to import my pressure details from CFD to Structural. They are importing well with 100% mapped summary. However the pressure arrows are not visible just the colored contours apperaed. How to fix this issue?
my other question is that my fluid and structural bodies are different fluid one is hollow and structural one is filled with ribs and spars but loads are mapped 100 percent without system coupling. so can i continue? their cross section is ame.
How much time should it take to import the pressure load into static structural?
It is taking too long and showing as
Shape: : Construct BilinearWeights ()- Bilinear weight calculations not available for all shape types. Using regular weight calculation.
Does it depend on number of nodes
Or should the mesh size be same in fluent and static structural
can you explain how to import multiple pressure data at different time steps.
I am only able to import data one time step at a time and add various pressures one time step at a time which is very tedious.
would you mind doing a video on how to simulate cutting operation and couple it with fluent. I want to know the temperature of cutting tool during turning operation and use it to do the FSI part. I do not know how to do FSI. It would be great if you make a video on this.
How to do a topology optimization for the component in the static structural? i tried doing it using the usual method but i am receiving an error where it says Topology optimization does not support the static structural solution by FSI method and voltage based loads. Can you please help me out here.
you have not use system coupling feature is that possible to carry out one way FSI without using system coupling feature
Can u plz make a video on how we can simulate and animated the flow using transient flow over any body
thanks so much!
Hi! I have a questions regarding the importing the pressure.
When I try to import my pressure load fro CFD, it does not show for me the forces like it did for your tutorial. Mine only shows that it was able to import the pressure load 100%.
Could this possibly be related to the settings or something? I would appreciate it if you could help me out.
Great video by the way!
Thank you sir
hey Vin,
thanks for making informative videos.
I am a student and new to Ansys
I need help doing Modal analysis of a beam submerged in water.
I used modal acoustic analysis system
i defined a beam and enclosed it.
but don't know how to define the fluid structure interaction between the beam surface and the fluid for my case.
kind reagards,
Umang
very good tutorial, can you make a tutorials on Refrigeration system(condensation &evaporation)
Thanks a lot.
Hey man, could you make a video on two way FSI?. I'm working on a project using jet engine blades and i'd really appreciate it if you could just outline the process for conducting two way FSI.
Cheers!
Thank you ♥️!
Thank you
how we can interact a=Ansys fluent and abaqus
Hi, That was a helpful tutorial. Is it true that for FSI, the CFD mesh (atleast) has to be tetrahedral; and that hexahedral mesh is not accepted in FSI? Please let me know
No, either mesh is accepted.
Hi there. i found your video helpful. however i have a question regarding two way couple simulation of FSI. im currently trying to figure out the motion of fluid that might cause vibrational effect (that needs to be visualize) on the body. is it possible using ANSYS? and willu upload and similiar tutorial on this?
Hello,
Thank you!
You are referring to the topic 'aeroelasticity'. More info can be found here:
www.cfd-online.com/Forums/ansys/99312-flow-induced-vibration.html
Hi, really helpful Tutorial explaining the concept of FSI!! ...Correct me if I'm wrong.. You have given a fixed boundary condition on both sides.. I assume this is because you're probably Modelling flow around a automobile spoiler.. Right?
Hello sir can please make a tutorial on wing flutter...it will be really helpful..thank you..will be waiting for your tutorial.
Add more videos, on fsi, structure which changes shapes due to loads.
Hey man,
Just a simple question, can i do the same thing using FLUENT but for a 2D case?.
I went through a couple of website(s) that FSI isnt possible for a 2D case using FLUENT and i have to implement a 3D mesh.
I've made my mesh in ICEM.
Sorry, 2D FSI does not work in Fluent
where is the cad file u imported
Thank You, Sir. This video is very helpful to me. can we also do analysis like filling the balloon with air/gas by using the Ansys (fluent)? Because i have to see the deformation due to the flow of fluid inside a thin cylinder without any outlet. if there is any such type of information you have then please let me know.
thank you
regards
Kirtan sahu
Did you ever find out about this?
Hi, my question:
- What is outlet?
- why your wing surface is divided into 16 parts?
- In meshing, can i use inflation with Yplus?
The outlet is behind the trailing edge of the wing
16 parts because the CFD surface is solid, while the FEA surface is hollow.
And yes, you can try using inflation Y+, I just did it an easier method
Hello,
I'm trying to simulate an underwater vehicle FSI simulation. I have obtained steady 3D total pressure distribution on the vehicle surface which I'm importing in mechanical in ansys workbench. I'm getting 100% mapping but the values of total pressure on the vehicle is not matching. Fluent - total pressure -2MPa, Mechanical total pressure - 606Pa! I have no idea why there is a mismatch between the output and imported data. please help.
Thanks,
Are you sure you selected the correct named selection? Check your boundary conditions.
Hello, i want to know how can i get hydrodynamic pressure on tank walls using ansys multiphysics after applying FSI by coupling nodes. transient analysis was performed
Hello,
Is this a 3D-Analysis? Then you will have to create a 'virtual volume' around the tank and set your initial conditions there. I am not sure how to make a virtual volume as all of my analyses are 2D, my computer does not have enough power for 3D.
What you can do is first perform the tank CFD simulation by setting a pressure on all 4 faces as usual, while previously creating a named selection to map the pressure-load to those respective faces, similar to what was done in this video. It's all about creating the correct named selection, using the appropriate locations as your surface.
One thing to note, selecting the inner tank walls might be a challenge, so you might have to use the 'selection filter' in the bottom left corner of the workspace, where you can select adjacent surfaces.
By hydrodynamic pressure do you mean sqrt(rho*g*h)?
Though I have not personally used the transient analysis feature, the principles should be the same, the only difference is that inertia is considered in transient, while ignored in steady state.
I hope this helps :), it's the best response I could give :(
Thanks for relpy.
Yes my problem is 3D but i don't know ansys workbench or cfd i used ansys apdl only.
I want to make ansys calculate hydrodynamic pressure from FSI between the fluid and the tank wall.
I wish you can help me.
Ansys APDL is the older version of workbench / mechanical / FLUENT.
You may have to use ANSYS FLUENT or CFD, and technically you do not need an FSI for this as you only have pressure to solve for, not deformation or deflection. I do not have any APDL experience, unfortunately.
Solve the problem with FLUENT, set the boundary conditions etc, and then go into post-processing (CFD Post). It might be much faster this way.
In CFD Post, you can select a 'region' where you want to calculate the pressure. For instance, you can define a 'plane selection' on the bottom tank wall, and then insert a chart (graph), where it shows the pressure.
Alternatively, you can define an 'Expression' and put the required formulas in there as well.
Here is an excellent link for the basics, the concepts I stated above is explained thoroughly:
confluence.cornell.edu/display/SIMULATION/2D+Steady+Convection+-+Numerical+Results
hi, can i know if i have two geometries, eg nacelle lip skin & piccolo tube, how do i select the imported load temperature in the steady state thermal? My fluent part is done with no problem
You have to create a 'Named Selection' for that specific region of geometry you want to import the values to. This has to be done at the very first step.
Then, select those faces as the 'Named Selection', and map it during your imported loading step.
VDEngineering yes i have created the named selection. Thing is my problem is i have a lot of BC defined. And i dont know that to choose for the cfd surface
You just have to note down what name you used, that's it.
Actually there's a way you can name the boundary condition also.
I don't have too much advanced experience with FSI unfortunately, so you might have to consult ANSYS website, or try on forums.
Hello do you know where to start on creating a simulation of water sloshing inside an elevated water tank subjected to harmonic loading using ANSYS? Should we use FSI?
I believe that would be a coupled loads analysis, so a two way FSI,
This tutorial won't apply for that unfortunately.
VDEngineering what do you mean by coupled loads? A combination of different loads?
VDEngineering thanks! That's my initial idea. I just needed a confirmation. Wish us luck on our thesis.
Yes
Good luck!
Hey how performing FSI releated to aeroelasticity?
Hello, this tutorial in itself deals with aeroelasticity!
Hi there, my question is:
What's the main difference between One Way and Two Ways?
Amazing video!
Thank you Steven!
See this link:
imechanica.org/node/11963
Thank you!!!
Hey man, could you make a video on two way FSI?. I'm working on a project using jet engine blades and i'd really appreciate it if you could just outline the process for conducting two way FSI.
Cheers!