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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. 

Kamlesh

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Kamlesh last won the day on May 2

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About Kamlesh

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  1. Dear All, Recording of the webinar is already updated in the website: http://www.altair-india.in/RelatedCaseStudy.aspx?id=10267 Regards, Kamlesh
  2. Postprocessing in Paraview

    Hi Abhay, First generate an Ensight output using Acusolve cmd prompt acuTrans -out -extout -to ensight -run [Run Number] Then load the .case file in Paraview Regards, Kamlesh
  3. Uniformity Index

    Hi Dinesh, Please find attached script for computation of Uniformity Index (UI) in Acufieldview. In the script, you can edit the below according to your problem: Using this script you can compute the UI value for the boundary surfaces. You can execute this script in Acufieldview, (Tools --> Execute FVX File) As soon as you execute the script, the UI value would be printed on the screen. Please let me know if you have any questions. Regards, Kamlesh computeUniformity.fvx
  4. Headlamp modeling in SimLab and CFD analysis using AcuSolve Webinar Hello, Altair is hosting a webinar this month Headlamp modeling in SimLab & CFD analysis using AcuSolve that I'd like to invite you to join. Headlamp modeling in SimLab and CFD analysis using AcuSolve Wed, September 27, 2017 at 11am IST The design of head lamps plays an important part in the development process of modern cars as it contributes significantly to the first impression of a car. However, beyond the design aspect technical requirements have to be fulfilled. Headlamp models can be a complex assembly with hundreds of parts. For an engineer to model it is itself a challenge. The modeling time will also depend on the details in parts that need to be preserved and the handling of the space between adjacent parts for quality elements to be created. In addition, the model size (number of nodes and elements) should be small to reduce the solver time. SimLab addresses the problems by reducing, if not eliminate, the need to simplify the CAD model thereby reducing the time for CAD cleanup operations. There are several tools that help create conforming mesh, adjust spacing between the bodies, etc. to generate a good quality TETRA mesh. Most important is the automation of the individual tools that reduces the overall time to generate a mesh ready for analysis. In addition to a mesh, the surfaces are grouped for easy boundary condition assignment. With respect to CFD-Thermal simulations, the knowledge of the maximum temperature of different components of the head lamp is of great importance during the development process, as the temperature limits of the various materials are not to be exceeded the material melting points. Therefore, CFD Thermal simulation is an important tool for the prediction of temperature distributions in head lamps during the development process. There are several modes of heat transfer from the bulb surface including conduction through the solid enclosure, natural convection, and radiation between surfaces which need to be modeled. This webinar outlines the CFD preprocessing of headlamps using SimLab and CFD Thermal simulation approach using AcuSolve for investigating the thermal distribution at various components inside an automotive headlamp" The methodology will be explained as below Step 1 : Introduction Step 2 : CFD modeling & Preprocessing of Headlamp in Simlab Step 3: CFD meshing in Simlab Step 4: CFD Thermal boundary conditions in Acuconsole Step 5: CFD Thermal simulation in AcuSolve Step 6 : CFD Thermal simulation results in Acufieldview. Who should attend? Component designers, CFD Thermal Simulation engineers and managers will gain a deep understanding about CFD modeling techniques and CFD Thermal simulation possibilities for a better design. More details please Contact Kamleshwar Rajender | Technical Manager-CFD kamleshwar.rajender@altair.com
  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. Deal All, We have uploaded 2017 India ATC Technical papers - CFD for AcuSolve in the below link: http://www.altairatc.com/india/2017/2017-Technical-Papers.htm There are currently 7 CFD papers uploaded from customers, some more of them also will be uploaded. Regards, Kamlesh
  7. Hi Rohit, You can define the mass flux BC at the inlet and define the pressure at the outlet BC and simulate it. You can also define the above and in the advanced options, you can assign the pressure at the inlet as well, its not advisable to do so. May be we can have a web meeting accordingly, to review your model. Let us know your convenient time. Regards, kamlesh
  8. Hi All, Please find attached tutorial for CFD optimisation of a manifold. Some of the applications, where it can be used includes, HVAC ducting • Reduce pressure drop • Increase flow uniformity • Maximize/minimize outlet temperature Heat exchangers • Maximize pressure drop • Maximize heat transfer Brake discs • Minimize temperature • Maximize heat transfer • Brake cooling ducts External Aero • Minimize drag • Maximize negative lift and many more. I have also attached a simple Pipe CFD optimisation tutorial. Please do contact us for any queries. Regards, kamlesh Acusolve_Hyperstudy_tutorial_manifold.zip Acusolve_Hyperstudy_Tutorial_Pipe.zip
  9. Num Krylov vector

    Hi Dinesh, You are welcome. Please do let us know for any further CFD queries. Regards, Kamlesh
  10. HM CFD Overview

    Hi All, Please go thorough the complete video recordings of new features introduced in HyperMesh (HM) Engineering solutions for CFD. Click here to view the HM Engineering Solutions CFD New Features Regards, Kamlesh
  11. Hi All, Click here to view a webinar on Nanofluidx capabilities Regards, Kamlesh
  12. Num Krylov vector

    Hi Dinesh, The krylov vector is used in the linear equation solver (GMRES), wherein you need to compute a base vector for the krylov subspace, in which the Euclidian norm of the residuum is minimized. The problem is, that you need all base vectors from previous iterations to compute the base vector for the current iteration, which is an expensive operation for solving. As the costs and memory increase linear with the number of iterations, it’s usual to drop the computed base and restart the iteration with the current approximation. The number after which the iteration gets restarted is the number of krylov vectors you define in AcuSolve. And this number determines how much memory you need for your computation with AcuSolve. Regarding convergence, a krylov vector which is too small can affect convergence negatively (in difficult cases), but at a certain level a higher krylov vector won’t improve the convergence anymore. If the problem had difficulty converging, this will/may help. If it is converging well, it does not help at all, and perhaps makes the solution a little more expensive. As a general rule, use 10 and perhaps 20-40 for the Flow thermal coupled system (Natural convection). Please refer the AcuSolve manual for more details as well. Regards, kamlesh
  13. Modeling multiple exits

    Hi Pradeep, Lets have a web meeting today at your convenient time. I need to understand the experimental set up and make sure the same is followed for the CFD simulation in AcuSolve. Let me know your convenient time today. Regards, Kamlesh
  14. Dear All, Both AcuSolve (CFD) and MotionSolve (MBD) Hyperworks Solvers can be coupled, cosimulation is possible. Certain Applications being real time Aerodynamics simulations, Wind turbines, Fuel tank sloshing, Pressure check valve etc. Click here to view the webinar on AcuSolve (CFD) & Motionsolve (MBD) coupling Attached is a tutorial on the same coupling - Pressure check valve. Regards, Kamlesh CFD_MBD.zip
  15. Dear AcuSolve Users, Please find the detailed procedure of mapping AcuSolve CFD results through linear interpolation option. It has a python script attached, a pdf document explaining the process to be followed. This Script can be utilized to get all the CFD results like Velocity, Pressure, temperature etc and map it onto other mesh for further analysis. Regards, Kamlesh Script.zip
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