-
-
September 21, 2018 at 10:53 am
malay_shankar
Subscribercan we input temperature as a function of two variables like (radius and angle)?
-
September 24, 2018 at 9:31 am
Rob
Ansys EmployeeCan you elaborate on what you're trying to do, and with which solver? Simple answer is yes, probably, it depends.
-
September 24, 2018 at 2:29 pm
malay_shankar
SubscriberHi, i am trying to give a temperature to the attached geometry (parasolid file) as function of radius and angle. The attached geometry is 1/8th of the full circular model.
i am using static structural module as i am currently interested in 2D steady state conduction.
Also, i need to know how to model or which connection to give between the contact surfaces of the upper and lower plates. I have updated the attachment as triangular geometry
-
September 24, 2018 at 2:39 pm
peteroznewman
SubscriberShankar, the ANSYS members on this site don't open attachments like Parasolid, but independent members like me do open attachments. You can't attach a Parasolid directly, but you can put any file type into a zip file and you can attach that as long as it is < 120 MB in size.
To get the best help from all members, it is better to use the Insert Image button and select an image file that you have saved on the disk from a screen capture program like Snipping Tool. If you paste the geometry into Powerpoint, you can annotate the image with some text and point to relevant features, then do another screen capture of the Powerpoint page, save that file then Insert that image into your next post.
-
September 24, 2018 at 3:37 pm
malay_shankar
SubscriberThanks for the feedback. I will quickly follow this
-
September 24, 2018 at 3:54 pm
-
September 24, 2018 at 11:29 pm
peteroznewman
SubscriberShankar, that is a good description of the geometry and the contact/gap conditions along the interface.
What boundary conditions to you want to apply to the edges in the 2D or faces in the 3D model? For example the top edge/face of the Top plate and the bottom edge/face of the Lower plate.
Are the boundary conditions such that they have no dependence on the angle of the slice and so you can have an axisymmetric model?
Is the Gap filled with air or another fluid?
Is there any flow of fluid in that gap or is it stagnant?
Do you have any data on the thermal resistance at the faces that are in Physical contact? ANSYS assumes perfect thermal contact, but the thermal resistance can be included in the contact definition.
Regards,
Peter
-
September 25, 2018 at 6:45 am
malay_shankar
Subscriber
Hi Peter,
Please refer to the images above for the boundary conditions.
In the 3D slice geometry case the temperature is dependent on the angle, so we can not take it as axisymmetric model.
Yes, there is a fluid flow from top but due to O-rings and gaskets installed the gaps will be insulated.
I do not have any data on thermal resistance, so kindly suggest me the ways in which I can model the thermal contact. If that data is needed to model, i will try to get it.
Thanks.
-
September 26, 2018 at 2:00 pm
malay_shankar
SubscriberFor a thermal contact between the two put a thermal conductance value. Is this correct?
I will try to get thermal resistance data and input it.
Regarding temperature input i am still struggling to find out a way to enter temperature as function of two variables. (radius and angle)
-
September 26, 2018 at 2:53 pm
peteroznewman
SubscriberShankar,
Create a Bonded Contact on the edges that touch in the 2D model (or on the faces that touch in the 3D model).
When you do that you can override the Thermal Conductance setting and type in a value of Thermal Conductance at that interface. When you leave it Program Controlled, it assumes there is no additional thermal resistance at the contact interface. You can instrument a prototype and measure the contact resistance. I don't know if there is a good generic value.
Any edges that don't have a Boundary Condition are assigned an Insulated BC in the solver, so you don't need to apply that manually.
It's not credible that there is no heat transfer across that thin gap, because it is so thin. If there is stagnant air in that gap, that can still conduct some heat. I recommend you add a body to fill that gap and assign the thermal conductivity of air to that thin rectangle.
Can you attach a zip file with an example of the distribution of the convective film coefficient, h, as a function of radius and angle? You show h in the diagram, but you mention a distribution of temperature. You can provide a temperature map also. I know there is a way to import a temperature map, I don't know how to create a field variable for h.
Regards,
Peter
-
September 26, 2018 at 4:10 pm
malay_shankar
SubscriberHi Peter,
Yes you are right, value of 'h' will be constant. Sorry for putting it wrongly in the image, my bad.
I have solved the 2D geometry and got the desired results. But, i need to solve the same with 3D slice geometry, and input temperature as a function of radius and angle.
Kindly help me on what is a temperature map and how it can be provided onto the model?
Thanks & Regards
Malay
-
September 26, 2018 at 4:22 pm
peteroznewman
SubscriberMalay,
Can you attach a zip file with an example of the distribution of temperature as a function of radius and angle?
If you specify a Temperature Boundary Condition on the top surface, then you can't specify a Convective Boundary Condition on that surface also. You have to choose one or the other.
Regards,
Peter
-
September 26, 2018 at 5:45 pm
-
September 27, 2018 at 11:39 am
peteroznewman
SubscriberThe "External Data" module is a convenient way to import external data and map it into the workbench module.
Check the following video for the format that is required:
Mapping by External Data system
Regard,
Peter
-
March 19, 2021 at 12:04 pm
BrijeshSingh
Subscriberhi.. I am using Ansys Apdl for laser drilling simulation. Please suggest to me how to do element removal during multiple steps...thanks in advance
-
- 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.

Ansys Blog
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.
- Saving & sharing of Working project files in .wbpz format
- An Unknown error occurred during solution. Check the Solver Output…..
- Understanding Force Convergence Solution Output
- Solver Pivot Warning in Beam Element Model
- Colors and Mesh Display
- How to calculate the residual stress on a coating by Vickers indentation?
- whether have the difference between using contact and target bodies
- What is the difference between bonded contact region and fixed joint
- The solver engine was unable to converge on a solution for the nonlinear problem as constrained.
- User manual
-
2524
-
2066
-
1279
-
1096
-
457
© 2023 Copyright ANSYS, Inc. All rights reserved.