TAGGED: Discovery AIM, Fluid Volume, fluids, graphics, mesh, optimization
July 12, 2019 at 5:44 pmseffaSubscriber
I am trying to model an airflow system in a mushroom growing room. The racks which contain the mushrooms are complex and the room contains 60 racks.
I have modeled the fluid volume in AutoCAD and brought it into Discovery AIM. I have previously ran the simulation without the racks in it with success. I am afraid the more detailed modeled is too complex.
I have ran the physics solver with the complex model and after about 3 hours it failed. I have reduced the solution fidelity and re-ran it, it is still trying to solve it.
One thing to note is that in both of these failed cases the solution monitor never displayed any iterations being done.
Computer specs are as follows:
Intel(R) Core(TM) i7-8850 CPU @2.60GHz
16.0 GB ram
64-bit, windows 10
NVIDIA Quadro P2000
Ive also attached an image of the model being processed, it is about 2 hours in and still dont see any iterations.
July 12, 2019 at 8:20 pmBrian BuenoAnsys Employee
You may just be running out of RAM. 16 GB is a relatively small amount. I would recommend simplifying the model. It looks like it's symmetric along the length of the room, and you could potentially take half of that remaining portion to get some indication of what the airflow would be like.
You could also set up an analysis with a few of the racks and examine the flow in much greater detail.
July 12, 2019 at 8:51 pmseffaSubscriber
Brian Bueno Well ive been monitoring my computers memory and it never gets above 13 GB. It may be the racks or the small holes in the inlet pipes. Theres 56 holes in each inlet pipe. I am going to start with a small scale model and slowing add more elements.
July 15, 2019 at 3:31 pmseffaSubscriber
Brian Bueno I get this message: "Pre-Boundary Layer generation has stopped because of side face limitation, proximity collisions and quality."
What causes this and how can it be avoided?
July 15, 2019 at 5:29 pm
July 19, 2019 at 10:21 amNaresh PatreAnsys Employee
The message is indicating that the boundary layer mesh generation failed due to the reasons mentioned in the message. You will have to check and modify the mesh sizes to ensure that boundary layers fit within the small gaps in the model. If you are using Physics aware meshing, you will have to add Mesh task to get access to mesh settings. To add mesh task, simply right click on Flow/Physics task and select "Define Mesh Manually" option which will add a mesh task to your current workflow.
Also looking at the small gaps in the model, You may want to reduce the number of boundary layers from 5 to 3.
- You must be logged in to reply to this topic.
Boost Ansys Fluent Simulations with AWS
Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
- loss of user settings
- Can’t see license on online account
- Copy user settings to new release
- help online
- Unexpected graphics error
- Electric Heating – Ansys AIM
- Dwg export error
- ANSYSLI Exited or could not read server port ANSYSLI_FNE_PORT
- Discovery AIM Mesh Error
- Natural frequencies limited to first 6 modes
© 2023 Copyright ANSYS, Inc. All rights reserved.