September 25, 2018 at 5:08 pmbirbara2Subscriber
Hello I want to ask what is the gauge total pressure in setting the inlet pressure boundary condition? and what is the supersonic/initial gauge pressure? and is the value specified as the amount over atmospheric pressure or the operating condition? or is it just the absolute pressure and if not absolute then can we specify it in absolute terms?
September 25, 2018 at 5:35 pmDrAmineAnsys Employee
All pressure input in Fluent are gauge pressure that means relative to the operating pressure. Example at your inlet you have 1 atm: Either you provide 0 Pa Gauge pressure and set operating pressure to 1 atm or the inverse or a combination
p_absolute=p_gauge+p_operating. P_gauge is the static pressure variable available for post-processing.
For subsonic flow solver expects that you provide 4 of 5 required boundary conditions (considering only momentum).The solver will provide the latter one (think about the method of the characteristics-a wave travelling out of the domain) For supersonic you need to provide everything (that means 5 for 3D only momentum). That is why for supersonic flow your input in supersonic/gauge pressure is used within the solver stage. For subsonic flow you can use that flow for the initialization if you hit "initialize" from your Inlet.
- 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.