March 14, 2021 at 1:32 pmshing97SubscriberMarch 15, 2021 at 2:57 pmRobAnsys EmployeeYou can define regions to patch, or set a fluid region in the geometry & mesh and then patch that. nMarch 16, 2021 at 10:34 amshing97SubscriberHi Sir, thanks for the reply.nBut if we define the regions and patch, it will be the initial condition where the substrate has been filled with the encapsulant?nThe initial condition will be as shown in the picture that I attached below. Then I want to fill up the region as shown in the second picture below. No matter how I try the results I could get is as shown in the third picture. （the fluid has a density of 1800kg/m3 and viscosity of 448cP）nn
You can define regions to patch, or set a fluid region in the geometry & mesh and then patch that.https://forum.ansys.com/discussion/comment/110879#Comment_110879nMarch 16, 2021 at 12:11 pmRobAnsys EmployeeYes, that will be the initial condition. nIf you're expecting the sketch as the final result, have you run the model for long enough, and what is there to stop the blue material filling the entire domain? nMarch 16, 2021 at 12:41 pmshing97Subscriber
Yes, that will be the initial condition. If you're expecting the sketch as the final result, have you run the model for long enough, and what is there to stop the "blue" material filling the entire domain?https://forum.ansys.com/discussion/comment/111020#Comment_111020I have tried to change the udf condition to make the fluid-filled in the substrate longer (the sketch i want), but the shape I got is shown as below:nThe sides of the fluid are getting higher yet the middle side is lower.nnMarch 16, 2021 at 3:28 pmRobAnsys EmployeeLook at the flow field, ie vectors of velocity and wall conditions. From the image I can think of a scenario for either result, you've not given any reason why one solution is correct and the other not. nMarch 16, 2021 at 5:47 pmshing97Subscriber
Look at the flow field, ie vectors of velocity and wall conditions. From the image I can think of a scenario for either result, you've not given any reason why one solution is correct and the other not.https://forum.ansys.com/discussion/comment/111069#Comment_111069Okay I will look into it, thanks Sir.nMarch 18, 2021 at 1:07 pmshing97Subscriber
Look at the flow field, ie vectors of velocity and wall conditions. From the image I can think of a scenario for either result, you've not given any reason why one solution is correct and the other not.https://forum.ansys.com/discussion/comment/111069#Comment_111069Hi Sir, here is a new question to ask.. What do I need to set to drip the fluid shape like picture 1 below:nActually, domain created (red colour) for the previous picture is assumed to be a vacuum.nHowever, I only able to get the initial state of the results (as shown in picture 2). Is it affected by the contact angle, surface tension, the diameter of the nozzle tip, or other conditions? Both are using the same value of the viscosity, density, and surface tension. The diameter of the nozzle tip is different in both cases.nnPicture 1:nPicture 2:nnnMarch 18, 2021 at 1:44 pmRobAnsys EmployeeWe can model low pressure, but not vacuum: read up on the Knudsen Number and continuity. nTo create a region like the above you need to use a patch: this can be a register or predefined fluid region. nViewing 8 reply threads
Ansys Innovation Space
- You must be logged in to reply to this topic.
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.Trending discussions
- Suppress Fluent to open with GUI while performing in journal file
- Floating point exception in Fluent
- What are the differences between CFX and Fluent?
- Heat transfer coefficient
- Getting graph and tabular data from result in workbench mechanical
- The solver failed with a non-zero exit code of : 2
- Difference between K-epsilon and K-omega Turbulence Model
- Time Step Size and Courant Number
- Mesh Interfaces in ANSYS FLUENT
- error in cfd post
© 2023 Copyright ANSYS, Inc. All rights reserved.Ansys does not support the usage of unauthorized Ansys software. Please visit www.ansys.com to obtain an official distribution.