March 11, 2022 at 2:08 amdivpatelSubscriber
I m doing ANSYS fluent simulation, where the fluid is the water, the solid portion is the fins, and the flow is flowing at Reynolds of 20, so laminar flow with energy turned on, and heat flux of 10000 w/m^2 is being added to the system from the top, here i have given the flow and the solid the initial temp of 300k , but the solid has the sudden jump in temperature, and then slowly rises which makes sense as it heats from the top more heat is progressively going to get transferred from fluid to solid, what i cant explain is the sudden temperature jump .
i have attached some pictures, if someone can let me know about this, of if I have set the initial temp in wrong way. do let me know thank you,March 11, 2022 at 1:52 pmKarthik RAdministratorThermal resistance on the fin side is much lower compared to the fluid - primarily driven by the high thermal conductivity. Is this what you are experiencing?
March 11, 2022 at 4:36 pmRobAnsys EmployeeAnd maybe answer my question in here too https://forum.ansys.com/discussion/37005/sudden-temperature-jump-for-solid
March 11, 2022 at 4:48 pmdivpatelSubscriberits steady state analysis in fluent
March 11, 2022 at 4:58 pmRobAnsys EmployeeIf you're adding heat to a solid, why would the boundary sit at the initial temperature?
March 11, 2022 at 5:04 pmdivpatelSubscriberI m adding heat flux to the top part which has a 1mm gap between it and the fins and as seen i have the line measuring temp at the bottom, i thought i d see a major temp contour from top to bottom but i think it just gains that extra energy cuz of better heat conduction in solids
March 14, 2022 at 2:04 pmRobAnsys EmployeeAnd in steady state we're modelling the equilibrium condition. The heat flux bc will raise the temperature in the wall cells to reach the set flux value: this can lead to very high temperatures if the flow can't carry the heat away.
Viewing 6 reply threads
Ansys Innovation Space
- 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.Trending discussions
- 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.Ansys does not support the usage of unauthorized Ansys software. Please visit www.ansys.com to obtain an official distribution.