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Found 12 results

  1. How to provide heat transfer between two blocks seperated by some gap .... I have tried TCID and KOHTC entries in PCONTHT Property. My main concern is to find out heat transfer amount between gap (between two blocks ) .... Should not use mesh or gap elements in that gap .... Finally I got some results ... Same way I have tried with various gaps but results are not changed with respect to various gaps.
  2. Hi, Is that possible to couple heat transfer (transient) analysis and direct dynamic analysis? I tried to execute the same procedure indicated in OS-1080: Couple Linear Heat Transfer/ Structure Analysis, but it doesn't work, due to an unsupported subcase (I wrote "TEMP=1" for the SUBCASE_UNSUPPORTED like in the tutorial). Thank you for your help.
  3. Hello everyone, I want to simulate heat pipes used in pcbs for heat transfer. But I have no idea whether this feature of condensation and evaporation is available in acusolve or not. Please help. regards, Tutulika
  4. Hi everyone, I am trying to perform thermal simulation with heat source and sink as boundary condition. I have a positive heat flux(as QVOL acting on solid elements) and a negative heat flux (as QBDY1 acting on conduction interface). However most of the time I could see that the simulation does not converge and the Temperature results are very big. Attached here I have 2 fem files with exactly the same geometry and boundary condition and element size, but different meshing directions. the 1.fem file yields correct results while 2.fem doesn not converge. I have tried to experiment with changing element normal and changing material direction all to be along heat transfer direction but still 2.fem file does not converge and I cant find what makes the difference in simulation results. can anybody check to see if you can converge the 2.fem file ? and what makes 2.fem file not converge? thanks and looking forward to hear from you Rafezi 2.fem 1.fem
  5. Hello all, I am doing CFD analysis of an electronic cabinet having 2 radial fans. Meshing is successfully done. But when I am trying to refine my volume mesh following error is being displayed " could not parse file". I have done surface meshing in hypermesh. For volume meshing in acusolve I have taken mesh size as relative with value of 0.125 . Now when I am trying to refine only air volume mesh with again relative mesh size of 0.008 it is giving error in generating mesh. Please help.
  6. Dear All, I try to do simple heat transfer simulation by following OS-1385. when I run the simulation I got Error 1000 message, I know that the CGAP material does not have material, but in the OS-1385, the CGAP also doesn't have material too. Please your advise. Best regards, Iron_man CASE01.fem
  7. Hello, I am trying to perform a transient heat transfer along a rectangular profile of 100mm. I need Initial conditions to be a temperature profile and not a specific temperature. The temperature profile is in form of an equation: T= Te+(Tl-Te)*exp(-m*x). Te=ambient temp Tl and m= some finite value. T=f(x) along the profile. I have run a matlab code in which I have obtained the values of temperature. Could you please help me input the values of temperature and then run a transient heat transfer analysis. Thanks in advance!!!!
  8. hello all, Warm greetings. I am stuck up with the problem combining both the use of a blower and radiation enclosure together. I have studied fan component tutorial and radiation enclosure tutorial separately . But when I tried to use both within a analysis it is giving "Run time error" message. Please suggest the possible solution. Regards, Tutulika
  9. Hello, I am analysing coolant flow in a cold plate. I have created 3 volumes namely 1. Fluid volume 2. Volume for cold plate so that in acusolve I will assign it a material 3. Heat source I have applied boundary condition and applied material to volume 2 and fluid properties to volume 1. but I am getting error in final processing. please refer the attachment for the error file and the cold plate design for reference(blue colour is heat source)
  10. Heat Transfer into the fluid domain is positive - when referring to OSI Heat Flux or ORI Heat Flux. However, heat transfer into the domain for OSI Convective Temperature Flux is negative - because of the U dot N term in the integral. (See the chart in the acuTrans section of the Programs Reference Manual.) The total heat flux across a surface is the sum of OSI Convective Temperature Flux, OSI Heat Flux, radiation surface heat flux, solar radiation surface heat flux. In order to perform an energy balance across a control volume, all of these components must be summed. It is not possible to break out conduction and convection portions of the heat flux. (Note that Convective Temperature Flux is not the convection heat transfer at the wall - in fact the Convective Temperature Flux should be nearly zero at the wall - because it is due to the flow - and there should be zero flow at the wall.) When you sum the various types of heat flux for all of the bounding surfaces, the sum should be nearly zero - depending on convergence.
  11. Dear Colleagues, I have a problem with heat transfer analysis. I am experienced with ANSYS thermal analyses and at the same time I am working with HyperWorks for a couple of years but it is my first more complex thermal problem that I am solving with HW. My problem is, I don’t know how to set properly the analysis Load collectors and steps. What I want to do: I have a part of a machine (rotating lathe table) which is heated by heat generated in bearings and motor. According to the norms I have performed on machine test and I need to reply this with FEA to obtain a model on which I can test construction changes. The machine has been working in a few timesteps, with different parameters. My question is how to set the Loadsteps to obtain a few substeps which are performed one after the other under the terms of the previous. Bellow I posted a shorten table of the experiment. The heat flux has been calculated analytically. Time [min.] heat flux [W/mm2] 0 – 30 hf1 30 – 60 hf2 60 – 120 hf3 ... After that I want to obtain the temperature distribution on the table and its deformation (displacements).
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