Tagged: chemkin, chemkin-pro, solver
-
-
August 25, 2022 at 1:35 pm
p.brosnan
SubscriberHi,
I am using the SI and HCCI closed 0-D reactors models for engine combustion simulation. I am exporting the data to MATLAB for post-processing. I would like a fixed step solver instead of a variable step solver, so my sequence lengths are the same (step sizes range from 5.2E-05 to 5.4E-05 sec with the variable step solver) when imported into MATLAB. However, all I can change is the maximum step size; hence, my simulations have different sequence lengths. Can a fixed step solver (i.e., 5.0E-05 sec) be used in these Chemkin models?
-
September 1, 2022 at 2:21 pm
Judy Cooper
Ansys EmployeeHi:
Unfortunately a variable timestep is what is generally used to run these types of problems, so the fixed option is unavailable. Your best option is to set the initial and max step size the same and make both small enough that the timestep length is unlikely to fall below the level that is set.
-
- 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.

Ansys Blog
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
-
2656
-
2120
-
1345
-
1118
-
461
© 2023 Copyright ANSYS, Inc. All rights reserved.