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    • Rahul Ponginan

      Please click here for a short but important announcement   03/26/17

      Dear Users Our Commercial and Academic users around the world can use these same forums here as before i.e. the Altair Support Forum , Commercial users from India with solver queries can go to the Solver Forum for India Commercial Users , Academic Users from India and AOC India Participants are requested to go to the Forum for India Academic Users and AOC India Participants , We will be tending to all queries in all the forums promptly as before, thank you for your understanding. 

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Found 18 results

  1. Hello, i am doing the Optistruct tutorial OS1090 and can't find "heat_transfer_fin.fem" file neither in Hyperworks installation folder nor via Altair connect. I tried by my self but when it comes to select nodes via ID and there is no picture showing the nodes position i am stuck. Please sb. help me finding the tutorials base-files. Regards, Björn
  2. Thermal Analysis

    Hello, I am trying to figure out how to model the heat generation on a brake rotor during braking using Optistruct. Are there any guides that describe this process or something similar to this? How would you approach this? The total energy of the system is known and will be evenly distributed over three brake rotors to stop the vehicle in a given time. Now, I need to model the maximum temperature reached.
  3. Delayed Convection

    Hi All, I have a question involving the HyperMesh preprocessor. I'm trying to run a transient thermal analysis, where there is a consistent base boundary condition, and convection is applied, but only after a delay. I'm having a hard time figuring out how to apply convection partway through the analysis. For example, I'm allowing the part to heat for 25 seconds, and then turning a fan on and blowing on it for the last 25. I have my TLOAD1, TABLED1, SPCD, and SPC collectors for convection, but I can't figure out how to apply this delay. I tried setting the TABLED1 value to 0 for the first 25 seconds, but that just sets temperature to zero I believe. I imagine the DELAY_OPTION would be helpful, but I don't know how. Thanks very much for any help you can provide.
  4. Uniformity Index

    Hi all, Kindly let us know how to calculate the flow uniformity through a given section/plane.
  5. Dear all, Please do register for the webinar on September 27th, 2017 (Wednesday) at 11 AM Headlamp modeling in SimLab and CFD analysis using AcuSolve Register on the link below: https://register.gotowebinar.com/register/8360683504294244097 Regards, Kamlesh
  6. Hello, I am working on a project to simulate the cooling phase in an enamelling process. I simply generated a composite cantilever beam with two different materials to obtain the stresses and displacements during cooling process. I will cool down the composite cantilever beam from an elevated temperature to room temperature. The problem is, I am new to thermal boundary conditions and I can't find the correct load collector combination to handle the problem. To summarize the simulation; 1. Structure is at 350 degrees celcius and it will cool down to 20 degrees celcius. 2. Due to thermal expansion coefficent difference, the composite beam will deform. Thanks in advance! Mert Cevdet Gunay
  7. RADIATION and time scaling

    Hello, i have a little question about the possibility of time scaling and the use of the radiation load collector. I used the factor 10 (1sec in simulation=10sec in real time) to speed up my thermal analysis with radioss. It works fine wenn i scale thermal conductivity and the heat transfer coefficent (for example convection) by the factor i used for speed up (10). Is this although possible for the radiation? Because i don't see any way to scale this value in correct way... With best regards Kintsch
  8. Thermal Analysis

    How can I perform a thermal analysis of a brake disc in Hyperworks? Guide me through some tutorial if possible.
  9. FLUX Tutorial

    Dear All, I want to make electrical simulation combine with thermal (heat transfer) aspect on complex assembly. I've made the FE model with hypermesh optistruct profile and export as .fem file, but I can not import it to FLUX. Is there any way to do it? Please, need your advise. Thank you, Best regards, Iron_Man
  10. Hi All Trying to run an Optistruct analysis to see how two layers of different materials will displace when experiencing a thermal load. In my case I have chosen points along a lattic where the temperature would be 80degC. But when running my model in Optistruct and in trying to view the results, the model cannot show a viable solution or a solution that makes sense, in fact, I have not setup the pre processing properly (it seems) which has lead to a model with massive deformation. Also I am unable to view the contours. The attached picture shows circled areas (red) where I have made equivalence nodes, there is an expected connection at these points (not defined). Hoping that anyone could give advice or guidance! Phil Busbar Copper Lattice Model 2D.fem Busbar Copper Lattice Model 2D.mvw
  11. Contact Thermal

    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
  12. Hello, I have a plastic part subjected to heated air and I want to simulate the thermal expansion (no CFD required, just a simplified thermal expansion with temperature inputs is sufficient). I am using HyperMesh for pre and post processing and my solver is Abaqus. I have no idea how to do this, already tried the Joule heating solver, static solver, explicit solver, etc always get some errors which has no meaning intuitively. Can anybody tell me how to go ahead with this? If there is a tutorial or a pdf on this topic what would be very helpful.
  13. Num Krylov vector

    Hi I am Working on a Thermal Analysis problem.If i increase the Num Krylov vector from the default value. Will there be change in results or It will lead to faster convergence What will be the optimum value of Krylov vector for Thermal Problems??
  14. I know how to define an output block to get the internal strain energy per unit volume within HyperWorks, and how to define custom objective function equations using the dequation button, but can't seem to call the internal strain energy, since I can't figure out how to define it as a response in HyperMesh. Is this feature supported in HyperMesh?
  15. Submitted by Anders89 on Tue, 05/04/2010 - 03:23 I wanted to pass along the results of my work with simulating the thermal system for a large CCD camera we are building - this is a dynamic model of the heat flow using cascaded elements, in effect a 1 dimensional slice through the camera assuming it is symmetric about the center (not strictly true, but good enough for the model). Surprisingly, the real data agrees with the model quite well, to ~10% - much better than I'd hoped given the approximations. The differences are probably unmodeled radiative effects in the internal elements - its hard to know the real surface emissivities, and there isn't really a lot of good data on material characteristics at these temperatures. I attach the model and a spreadsheet that contains data and renderings of the camera. The cooling is provided by 2-stage variable-speed helium cryo-pumps, I've put in curves for 2 speeds, might get around to doing an interpolation table to look at controlling the temperature by varying the pump speed but that isn't the operating plan at the moment. Hope this is interesting/useful... Mark F. Waterson Sr. Detector Engineer Mount Stromlo Observatory Research School of Astrophysics and Astronomy Australian National University Cotter Rd Weston, ACT 2611 Australia Skymapper Camera temperature flow.vsm
  16. Hello guys, I am undergoing master in university right now and my title of my research is "OPTIMISING THE COMFORT IN MOTORCYCLE HELMET BY THERMAL/MOISTURE MAPPING". It is all about the effect of temperature inside the motorcycle helmet during riding a bike. Therefore, it is related to CFD which will effect the thermal energy inside/outside the helmet. The question is, how should I approach this type of case study using HyperWorks? I would be great if you guys attach some of tutorials. - example of vented motorcycle helmet image attached () plus I tried this tutorial (http://training.altairuniversity.com/analysis/thermal/projects/thermal-analysis-heat-transfer/) using HyperWorks version 13 but I stuck with assigning "Conductivity" Tutorials () Mine () Thanks. Mixi
  17. Assembly Interference Analysis

    Good Afternoon all. I'm looking for some guidance. I would like to run a simulation in which I can determine the contact pressure and the stress between two 3-dimensional parts. I'm not familiar with contact mechanic simulation and I am not interested in transient forces. I would like to know stresses and deflections of both parts, post-assembly. I presume I can do this with the Optistruct implicit solver but I'm not sure how to setup the contact card. Can someone walk me through the pre-processing part of doing a press-fit analysis with Optistruct? I can provide geometry and boundary conditions, but I'm lost when it comes to contact and Optistruct capabilities. Thanks.
  18. Hi I'm trying to develop passenger thermal comfort, and I don't know how to setup relative humidity inside the cabin. Anyone have any idea? For the prediction of passenger thermal comfort the distribution of humidity inside the cabin plays an important role. The relative humidity at the vicinity of an occupant changes in time through temperature changes and potential drying of the air. Therefore a species equation must be added to the system of equations. With this the transient convection and diffusion of water vapor inside the passenger compartment is simulated. Thanks Regards