March 17, 2021 at 2:06 pmWeidongSubscriber
I am dealing with a Simulation of objects entering water. However, I am a beginer and can not handle some problem.
Could you please give me some suggestion about my cases? It seems there are duplicated elements in my case.
Thanks so much.
WeidongMarch 18, 2021 at 12:38 pmKarthik RAdministratorHello,nWhich tool are you using and what is your end goal? Do you need to see the impact of flow on these objects? Are these objects moving in the flow field?nKarthiknMarch 19, 2021 at 8:18 amWeidongSubscriberHi,nThanks so much for your comments. I plan to study the impact on objects. The objects is moving in the flow filed.nBy now, I have difficult to run this case. It seems there is something wrong with my case settings.nBest regards,nWeidongnMarch 19, 2021 at 12:31 pmKarthik RAdministratorHello, nCan you confirm if you are using LS Dyna for this?nKarthiknMarch 19, 2021 at 12:37 pmWeidongSubscriberHi,nActually, I am not sure if Ls DYNA is suitable for my work.nI want to simulate the collision of two objects on the floating water surface.I used to simulatie some collision cases by LS DYNA, and it works well. Besides, the ICFD function is also available now.Therefore, I would like to try LS DYNA for my work.nBest,nWeidongnMarch 19, 2021 at 3:15 pmRobAnsys EmployeeHow fast is the collision? LS Dyna is for fast events, for floating objects AQWA may be suitable. nMarch 20, 2021 at 2:27 amWeidongSubscriberHi,nThanks for your coments.nThe speed is around 1~2 m/s. I think LS DYNA could be ok for my collision case, just I am not sure if DYNA is also good at fluid.nBest,nWeidongnMarch 23, 2021 at 12:20 pmKarthik RAdministratorHi,nLet me forward this question over to an LS Dyna expert to get their inputs.nKarthiknMarch 23, 2021 at 12:22 pmWeidongSubscriber
Hi,Let me forward this question over to an LS Dyna expert to get their inputs.Karthikhttps://forum.ansys.com/discussion/comment/112119#Comment_112119Thanks so much for your help.nApril 1, 2021 at 11:36 pmReno GenestAnsys EmployeeHello Array,nnDo you need to include the water? For a ship impacting another ship simulation with LS-DYNA, we typically don't include the water. The mass of the ship is so large that the water effect is insignificant. All you need is the initial velocity of one ship just before impact with the other ship or object.nhttps://www.dynalook.com/conferences/european-conf-2001/57.pdf/viewnnIf you have a boat floating on water, you can model the water using ALE. Here are some good papers:nnArraynArraynhttps://www.dynalook.com/conferences/international-conf-2004/04-1.pdf/viewnAnd some simple examples:nnArraynnIf you want to go with ICFD, have a look at these examples first:nnhttps://www.dynaexamples.com/icfd/intermediate-examplesnnAnd do a search for ICFD on dynalook.com for some good papers.nnLet me know how it goes.nnReno.nViewing 9 reply threads
Ansys Innovation Space
- 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.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.