November 27, 2019 at 5:51 amhappykiranSubscriber
Recently I was working with a problem where point mass and gravity are considered. but instead of Gravity, I applied acceleration in the upward direction and the results are same. unable to understand which is correct either gravity or acceleration?
November 27, 2019 at 11:24 ampeteroznewmanSubscriber
Gravity is always 9.8 m/s^2 and you can point it in six directions.
Acceleration can be any number and you can point it in any direction.
If you make Acceleration 9.8 m/s^2 in the +Y direction, that is identical to Gravity in the -Y direction.
November 28, 2019 at 5:01 amhappykiranSubscriber
Thank you, Peter, for the clarification. But my question is that y Acceleration should be applied in +Y direction which is the same as -Y direction of Gravity. is there any supporting documents (Or theory which proves).
November 28, 2019 at 3:27 pmpeteroznewmanSubscriber
You can build a simple model to demonstrate. Make a cube, use a fixed support on the bottom, add -Y gravity, solve and request the reaction force at the fixed support. Suppress gravity and apply a +Y acceleration of 9.8xxxxx m/s^2 (there are more digits you can see in the Gravity field), solve and look at the reaction force. It will be the same.
It's just a sign convention. If you use FLUENT, the sign convention for acceleration is opposite, you use -Y acceleration of 9.8 m/s^2 to create the effect of gravity.
November 29, 2019 at 5:53 amhappykiranSubscriber
- 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.
- 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
- Difference between K-epsilon and K-omega Turbulence Model
- The solver failed with a non-zero exit code of : 2
- Time Step Size and Courant Number
- Mesh Interfaces in ANSYS FLUENT
- error: Received signal SIGSEGV
© 2023 Copyright ANSYS, Inc. All rights reserved.