June 17, 2019 at 6:30 pmasanchez84Subscriber
I'm want to run a transient simulation of an axial pump (stator-rotor - stator) using a converged steady-state result file as the initialization for my transient simulation.
***I started with a simple model in which I would like to rotate the second section of the cylinder for a better understanding of the complexity of the problem***
While the initial conditions for the stationary domains are successfully interpolated, I'm receiving the following error:
| FATAL ERROR :
| Initial values are required for all variables in TRANSIENT runs.
| In this simulation, no initial value was set for
| Variable: Velocity
| Domain: Impeller
| The value can be set using the Initialisation Branch in CFX Pre.
| To bypass this message and use default solver initial values,
| set the expert parameter "transient initialisation override = t"
I know that the Domain Initialization tab of the Impeller Domain should be defined in order to proceed with the simulation.
Therefore, I decided to use a Rotating Frame Type to apply the initialization values relative to the Impeller domain and the Automatic Cartesian Velocity components to evaluate the last iteration of my steady run, but this option didn't work.
I would like to use the cartesian velocity components (u,v,w) of the last iteration of the steady state run to start the transient run in the rotary domain
Is there any way I could storage these values on the steady run and use them as a CEL function on my transient run? or which would be the best way to do it? (I'm connecting the CFX blocks instead if loading the solution file for the Initial Values)
I've played around with a Domain Initialization using 0 [m s^-1]for each velocity component (u v w) and static pressure of 0 Pa and the solution correctly integrates the steady and transient run (Image below). But I know this affects the transient run and I would like to take the steady continuous to start the transient one.
I've attached several attachments for a better understanding of my problem
- 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
- 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.