December 11, 2017 at 9:56 pmoberstarSubscriber
I am working on a two phase simulation for pulsatile blood flow in a straight vessel with an injection into it from a catheter that is a constant flow rate.
I need to include a turbulence model but it appears to be a very big can of worms as to which turbulence model to pick as well as what parameters to implement on the chosen turbulence model.
Does anyone have any advise for model selection as well as parameter selection?
My pulsatile flow ranges from 20cm/sec to ~115cm/sec through a 6.35mm diameter "vessel" and the constant injection of 206cm/sec through a 1.17mm catheter. the geometry is essentially two concentric tubes axially aligned.
December 12, 2017 at 3:57 pmraul.raghavSubscriber
A quick calculation of the Reynolds number for case shows that the flow would be laminar (Re < 1000 based on a density of 1125 kg/m^3 for blood and viscosity assumed to be 10 times of that of water). Why do you say that you "need to include a turbulence model"?
Additionally, refer to the following paper which does a similar work with blood flow in different catheter geometries and how they implement a turbulence model:
December 14, 2017 at 6:04 pmJosé MantovaniSubscriber
I believe that the path our friend Raul has given him is the best. Search for literature on turbulence models for non-Newtonian fluids. Here are two possible references.
- 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.
- Floating point exception in Fluent
- What are the differences between CFX and Fluent?
- Difference between K-epsilon and K-omega Turbulence Model
- Getting graph and tabular data from result in workbench mechanical
- The solver failed with a non-zero exit code of : 2
- Time Step Size and Courant Number
- Mesh Interfaces in ANSYS FLUENT
- Suppress Fluent to open with GUI while performing in journal file
- error: Received signal SIGSEGV
- Using GPU in FLUENT
© 2023 Copyright ANSYS, Inc. All rights reserved.