November 26, 2022 at 11:54 amMarcel MikołajczykSubscriber
I am doing first steps with CFD and currently working on a project with my profesor regarding detonation in detonation pipe.
The problem looks as shown below. There is no inlet nor outlet and simulation is transient.
My question is how to define such initial conditions, that the first part of geometry has pressure of 8 bar and the remaining two parts have 1 bar and how to define that the whole boundary consist of stochiometric mixture of hydrogen and air.
The second question is how to import combustion mechanism for detonation of hydrogen-air mixture? My profesor told me to use this. Below only part of the mechanism is shown.
Should I use only reaction mechanism or thermodynamics and transport too?
December 9, 2022 at 1:08 pmNikhil NaraleAnsys Employee
"how to define such initial conditions, that the first part of geometry has pressure of 8 bar and the remaining two parts have 1 bar"
You can patch different cell zones with the initial pressure values. Check this section of the user's guide for more info: 32.9.2. Patching Values in Selected Cells (ansys.com)
"how to define that the whole boundary consist of stochiometric mixture of hydrogen and air."
I didn't get this. Can you please elaborate?
"how to import combustion mechanism for detonation of hydrogen-air mixture"
For this, you may want to check this: 44.1.54. File/Import/CHEMKIN Mechanism... (ansys.com)
If you are not able to access the links, please refer to this forum discussion: How to access the ANSYS Online Help
- 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.
- 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.