October 15, 2018 at 3:47 amledinhanhSubscriber
I am making the UDF cavitation based on Merkle cavitation model.
The UDF base on the manual provided by Ansys Fluent 12.0. In that, they states as: "Assuming mdot denotes the mass transfer rate between liquid and vapor phases, we have Re = MAX[mdot, 0]fl Rc = MAX[−mdot, 0]fv where fl and fv are the mass-fraction of the liquid and vapor phase, respectively. DEFINE CAVITATION RATE is used to calculate mdot only. The values of Re and Rc are computed by the solver, accordingly."
It means that when calculation mdot, I need to divide the mdot by fl for evaporation, and by fv for condensation; then the solver will calculate the Re and Rc automatically by multiple with fl and fv respectively to return the correct value ???
Can you help me correct it???
October 15, 2018 at 4:31 am
October 15, 2018 at 4:45 am
October 15, 2018 at 6:21 amDrAmineAnsys Employee
Please use DEFINE_LINEARIZED_MASS_TRANSFER to model your cavitation rate. In the manual an example is provided for Zwart et al. model. The DEFINE_CAVITATION_RATE is the one to be used to adjust the Singhal et al. model.
October 15, 2018 at 7:55 amledinhanhSubscriber
Thank you Amine,
I will try your suggestion!
October 15, 2018 at 8:14 amDrAmineAnsys Employee
You are welcome!
- 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.