January 15, 2018 at 7:40 amVishal GanoreAnsys Employee
Modeling flapping mechanism in Fluent needs considerable effort and time since you are bringing flapping motion (needs motion UDF, good quality mesh, additional dynamic mesh setting, turbulence etc.). Many students are trying to solve such problems. So I am sharing following useful materials/information to get you started:
1. Generate good quality mesh around flapping region
2. Refer this flapping door tutorial (files are attached):
Part 1 Problem setup and results:
Part 2 (UDF and Dynamic mesh):
3. Flapping tube tutorial discussion: http://studentcommunity.ansys.com/thread/dynamic-meshing-of-bending-tube/?postbadges=true
4. Here is my blog on similar flapping wing: http://www.ansys-blog.com/dragonfly-flapping-ansys/
February 6, 2018 at 3:30 amwbmckinneySubscriber
What version of Microsoft Visual Studio would you recommend installing to compile the UDF? I was trying to install VS Express 2012 but cannot find it available anywhere. Please let me know your thoughts.
February 6, 2018 at 6:58 amVishal GanoreAnsys Employee
This information is available in ANSYS Fluent manual for respective ANSYS versions.
2012 VS Express + VS SDK is available here: https://www.visualstudio.com/vs/older-downloads/
If you are using latest ANSYS products 18.0 and above, you could go ahead with latest 2017 VS Community.
February 8, 2018 at 6:23 amankushcool288Subscriber
I followed your tutorial step by step but some error is popping up and I quote "the udf library you are trying to load is not compiled for 2ddp on the current platform(win64)".
Please explain to me how can I remove this error.
February 8, 2018 at 7:37 amVishal GanoreAnsys Employee
May I know how are you launching Fluent?? Are you using VS compiler and MS SDK? If possible, please share your project file achieve (.wbpz).
February 12, 2018 at 9:22 amankushcool288Subscriber
I am happy to tell you that I have removed my errors with the help of my friend. Your tutorial helps me a lot and I want to explore more about it. Please keep sharing.
February 22, 2018 at 6:23 pmwbmckinneySubscriber
I am having issues with my model for the flapping tube. Vishal, you recommended to not have a thickness on the tube. However, I am having trouble inputting the tip region of the tube as a wall BC instead of an interface BC. Right now I have 2 separate parts in my model: the atmosphere and the tube. Also, I get an error when I try to run the dynamic mesh saying negative cell volume. Please let me know if you have any suggestions.
February 22, 2018 at 9:27 pmRaef.KobeissiSubscriber
March 21, 2018 at 6:03 amjaiswal.3Subscriber
I am also facing the same problem you have faced.Can you help me to remove this error out? Any help from your side will be really helpful
March 21, 2018 at 6:40 amjaiswal.3Subscriber
Nice Tutorial.I am also working in the area of hydrodynamics of oscillations.Please guide me, how to start with UDFs and what are the prerequisites,like software compatibility and what are the necessary steps before compiling the UDFs.I have tried your tutorial and facing the error like "The UDF library you are trying to load is not compiled for 2D on the current platform.The system cannot find the file specified."
April 3, 2018 at 8:21 amVishal GanoreAnsys Employee
Manish, Can you provide following details?
1. Which Microsoft compiler are you using?
2. Which version of ANSYS?
3. How are you launching Fluent? Through workbench or standalone mode or through MS SDK command prompt?
Files (including UDF and fluent case) are attached above which you can take and test. My understanding is you have a compiler issue.
April 3, 2018 at 10:04 amjaiswal.3Subscriber
The microsoft compiler which I am using is Visual studio 2010
I am using ANSYS '13'
I am launching Fluent through Workbench,
I also think that there is a compiler issue, how to fix that.
July 18, 2018 at 9:29 pmmahdishuvoSubscriber
Thanks for the tutorial. I have followed the similar equations and UDF but the motion of the body is not harmonic. the body is rotating around the center of rotation. What could be the possible reason? I can share .wbpz file if you want.
July 19, 2018 at 6:34 ammahdishuvoSubscriber
My default time step was 1. If i make the time step to 0.1, it oscillates nicely. I don't actually get why this happens. Can any of you give me some ideas?
August 21, 2018 at 7:40 pmDrAmineAnsys Employee
August 23, 2018 at 1:17 amKarthik RAdministrator
This is an excellent tutorial.
March 18, 2019 at 2:07 pmpsalmsystSubscriberThanks for this tutorial.
However, I will like to know what part of the code Is responsible for the fixed end. What if I want the right end to be fixed while the other end flaps?
I have a similar project but my door is vertical. Will like to know how to make either ends fixed
March 22, 2019 at 7:17 amVishal GanoreAnsys Employee
Define the center of gravity location that we specify in Dynamic mesh zone in Fluent panel. The code only defines the motion of the rigid body.
May 19, 2019 at 7:05 pm
August 7, 2019 at 12:09 pmShuvadeepSubscriber
In the tutorial above, where is the origin. Is it at the plate center or at the hinged point?
May 12, 2020 at 11:12 amsarvapriyasinghSubscriber
could you please help me out in the same error what you were getting ?
January 17, 2021 at 10:33 pmrexfoxoloughlinSubscriberI'm getting the same errors, did you figure it out?n
October 13, 2022 at 11:47 amMohammad Reza SoufivandSubscriber
Is it possible to access the mesh and UDF files of this simulation? I didn't see any attached files or download link.
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