October 12, 2018 at 6:42 amRajat25AryaSubscriberI am facing some problem in simulating the Cold Flow Analysis of IC Engine. I have to do full cycle simulation 0-720 CA but when piston reaches 155 degree CA Exhaust Valve opens and solver shows an error "Update Dynamic mesh Failed, Negative cell volume detected".
this error also occurs when inlet valve opens at 318 degree CA.
Except this the simulation is running quite good.
My solver is ANSYS FLUENT IC Engine 16.2.
Input Parameters are
connecting rod = 130 mm
crank radius= 44 mm
Engine speed=2000 RPM
minimum valve lift= 0.1 mm
This problem is solved by using "Keygrids" on that specific angle but then another error occurs named "UNASSIGNED INTERFACE DETECTED" simulation stops.
October 30, 2018 at 6:21 amseeta guntiAnsys Employee
The error "Unassigned interface detected" means that you have some non-cormal interface zones which needs to stitched together. When you have non conformal interfaces, like interface 1 and interface 2 defined after reading the mesh into fluent, you need to visit mesh interfaces and select these two in each colume and give a new name of the interface and hit create. This will take care of transferring fluxes across two zones and interfaces.
For more information, you can go through the Fluent help manual.
- 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.