Ansys - Workbench - Heat transfer Problem - How to simulate a heat flow in a cylinder for two different top and bottom surfaces ?

24 July 2023 1 945 Report

Hi !

This seems like a not so complex problem to solve although I am not able to set up my ansys workbench, steady state thermal model correctly. Lets say we have a cylinder of length L with sides A and B. If my Ta = 500 deg C and Tb = 10 deg C, I am trying to find the time it takes for them to equilibrium around the length L. This also means that I want to see how the heat transfer looks like. I gave the upper and lower boundary temperature, although I am not sure how to setup for what I want.

Kristaq Hazizi

To simulate the heat flow in a cylinder with different top and bottom surface temperatures in Ansys Workbench, you can follow these steps:

Geometry Setup: Start by creating the 3D geometry of your cylinder with sides A and B and length L in a CAD software. Save the geometry in a format compatible with Ansys, such as STEP, IGES, or Parasolid.

Import Geometry to Ansys Workbench: Open Ansys Workbench and create a new project. Import the geometry you created in step 1 into the Workbench project.

Physics Setup: Add a "Static Structural" analysis system to your project to perform thermal analysis. Under the "Model" tab, define the material properties of the cylinder, such as thermal conductivity (k) and other relevant properties.

Meshing: Generate a mesh for your cylinder to discretize the geometry and prepare it for thermal analysis. Use an appropriate mesh size, considering the length L and sides A and B, to ensure accurate results.

Boundary Conditions: Define the boundary conditions to represent the temperature at the top and bottom surfaces. Apply a "Fixed Temperature" boundary condition at the top surface (Ta = 500°C). Apply another "Fixed Temperature" boundary condition at the bottom surface (Tb = 10°C).

Solver Settings:Under the "Analysis Settings," choose the appropriate solver for thermal analysis, such as "Thermal" or "Transient Thermal," depending on whether you want to simulate steady-state or transient heat transfer.

Solution and Post-processing: Run the analysis and wait for the solution to complete. After the simulation is finished, you can visualize the results using various post-processing tools in Ansys Workbench. You can plot temperature distributions, heat flux, or any other relevant heat transfer parameters.

Steady-State vs. Transient Analysis: For steady-state analysis, you can choose the "Thermal" analysis system, which will assume that the temperature distribution reaches equilibrium and remains constant over time. For transient analysis, you can choose the "Transient Thermal" analysis system, which allows you to observe how the temperature evolves over time until it reaches equilibrium.

Time to Equilibrium: If you are performing transient analysis, you can observe how the temperature at different points in the cylinder changes with time. The time it takes to reach equilibrium will depend on the material properties, initial temperature distribution, and geometry of the cylinder.

Remember to carefully review and validate your simulation setup before drawing conclusions from the results. Make sure to use appropriate material properties and boundary conditions based on your specific use case.

Badges
Science topic

Similar topics
Geoscience
Remote Sensing

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

What are the countries most affected by extreme rainfall as a result of climate change?

Increased heat, drought and insect outbreaks, all associated to climate change, have increased wildfires. Decreasing water supplies, declined agricultural yields, health impacts in cities owing to...

01 March 2021 7,168 9 View

How to show arrows over the streamlines in CFD-post?

I follow this to make streamlines like the photos attached below: (software- CFD post-processing) First I plot the 2D streamline over a surface "streamline 1". them I plot a vector by the...

01 March 2021 8,668 3 View

Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS?

I need to model masonry and reinforced concrete minarets for my MSc thesis. Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS? (Or any other program for just...

01 March 2021 736 3 View

What is recommended for solid domain in ANSYS FLUENT?

Should I mesh the solid domain ? or should I use wall thickness? or Shell conduction? for Heat Transfer between two fluids of a Heat Exchanger. what is recommended?

01 March 2021 9,785 3 View

Can Virtual Servers (remote dekstop manager) run heavy ANSYS Fluent CFD simulation ?

I have a virtual machine. My host Pc specs are not that good thats why i went for virtual servers. so basically my host pc has 8gb of ram with nvidia quadro k2200 4Gb DDR5 GPU ,processor intel...

01 March 2021 8,415 1 View

Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

How can i resolve the "final solutuin is not converged" error in Comsol for my heat transfer simulation??

I have been trying to simulate heat transfer problem in Comsol 5.5 for long time but it always throw an error stating: "Failed to find a solution. Maximum number of Newton iterations...

28 February 2021 8,626 3 View