Learning Forum

[Jiezougt]

Hello All,nThe model I am trying to do is to apply solar radiation, conduction, and convection into a bridge model. It is a transient model - solar radiation is changing with the time. The bridge has concrete deck and steel box girders. Trying to perform temperature analysis in Fluent, then map the temperature distribution result from fluent to perform structural analysis in Mechanical. nIs it possible? In this case, I do not have to manually transfer temperature results from fluent and add it as a BC in mechanical. nIf this is doable, I am assuming I have to use the same mesh to map the temperature results from Fluent, am I correct? That means I have to use Meshing tool from workbench to create a mesh that is compatible in both Fluent and Mechanical. nDid I miss anything here? Please advise, any suggestion is very much appreciated!!nnThanks,nBrandon n

[Karthik R]

Hi,nYes, this is doable. You should be able to solve for the temperature field in Fluent and impose this temperature field on Ansys Mechanical for structural analysis. Depending on how you are setting up your problem, you will need either one-way or two-way coupling between Ansys Fluent and Mechanical. You will need to use System Coupling' for this. Here is a video that might help you.nArrayYou don't necessarily need to have a one-to-one mapping between your Fluent and Structural meshes. System Coupling would help interpolate the obtained solution when you are attempting to transfer the solution from one solver to another. nThank you.nKarthikn

[Jiezougt]

Hi,Yes, this is doable. You should be able to solve for the temperature field in Fluent and impose this temperature field on Ansys Mechanical for structural analysis. Depending on how you are setting up your problem, you will need either one-way or two-way coupling between Ansys Fluent and Mechanical. You will need to use "System Coupling' for this. Here is a video that might help you.https://youtu.be/wSWlUitNas0You don't necessarily need to have a one-to-one mapping between your Fluent and Structural meshes. System Coupling would help interpolate the obtained solution when you are attempting to transfer the solution from one solver to another. Thank you.Karthikhttps://forum.ansys.com/discussion/comment/105942#Comment_105942

Thank you, Karthik, for the prompt response! And the video!!nWhat would be the requirement in order to get the System Coupling to work? To be specific for my questions:nIf one-to-one mapping is not needed between the meshed model in Fluent and Mechanical, is there any other requirement I need to becareful?nDo the geometry (the geometry from SpaceClaim) need to be exactly same?nThe walls/wall shadow in Fluent, which are autogenerated between regions, can they be transferred into Mechanical? This wall is a steel structural plate separating two air regions. nThe wall/wall shadow pair is between two fluid regions (both are air)nThe wall is suppose to be a thin steel plate, which in fluent is just a wall with a thickness assigned and layer conduction activated.nIn mechanical, if this wall is a shell-meshed area (not solid). Is this meshed area mappable from fluent wall? (Fluent has this wall as a wall between solids)nAdditional question (not related to any above): I am trying to model steel bridge box girder (thin steel plate wrapping as a box), the air outside of the girder, and the air inside of the girder in Fluent. Should I use area and shell element for the steel? Or should I use really thin solid element for the steel in Fluent? (steel box is about 30m long, 2m high, 3m wide, and 10mm thickness). I am having a hard time determining which way is the best - this thin plate sounds like a good fit for area and shell, but Fluent is giving me hard time when using water-tight geometry workflow for meshing.nnThanks!nBrandonn