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IDAC eNews
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Issue 36
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IDAC eNews Welcome to the 36th edition of eNews with the latest information from IDAC to keep you fully up-to-date on our events, courses, products and the company. Contents 1. Latest News
Case Study In this edition of eNews we present a case study that highlights the use of ANSYS Multiphysics in the development of Phillips CDM-lamps. The challenge in developing CDM-lamps is to find a thermally and mechanically robust lamp design, which is able to last a specified time. Accurate simulation of the gas discharge, the wall temperature and the mechanical stresses are needed to fulfil these targets. Click here for more information on the Phillips Electronics Case Study. Tips, Tutorials and Free Downloads Use DesignModeler to produce a better mesh. DesignModeler can be used to produce a mesh of better quality or to reduce the number of elements required to obtain a similar level of accuracy for the solution. Here is an example of one of the methods that can be employed: (1) A component consisting of a single part looks like a small block sitting on top of a bigger block. See Figure 1 (2) Bringing this component into Simulation and meshing it creates an acceptable tetrahedron mesh. See Figure 2 (3) To get a better quality of mesh, we need to be able to "sweep mesh" a part. To do this, the bodies that make up the part need to have the same topology at the "front" and "back". For our example, this means extending the geometry of the small block through the bigger block, creating a "footprint" of the smaller block on the rear face of the bigger block. (4) The first step in this procedure is to create a "Named Selection" containing the face of the small block that we wish to extrude. See Figure 3 (5) We then extrude this "Named Selection" as a Frozen material. This produces a separate part that doesn't get merged with the material that already exists. See Figure 4 (6) The "Named Selection" is extruded again, but, this time, it is used to cut material away from the original unfrozen part. See Figure 5 (7) We are now left with two parts: the original unfrozen material with a hole cut through it and the new frozen material that acts as a "plug". The import factor here is that both parts are now sweep-meshable because the topology of each part is the same for the "front" and "rear". (8) We could import this two-part assembly "as-is" into Simulation and create the mesh, but it would have to rely on bonded contact surfaces to keep the assembly together. It is better, in this case, to use DesignModeler to create a new multi-body part from the two bodies, so that no contact surfaces are required. See Figure 6 (9) When this multi-body part is brought into Simulation, it is now possible to create a swept mesh. See Figure 7 Simpler methods, such as slicing geometry to create multi-body parts, can also greatly enhance the accuracy of your mesh or simply allow you to produce the same quality of solution with fewer elements and, therefore, in a shorter time. For more information on DesignModeler, contact IDAC on (0)870 160 5900. Training For more information on our training course discount email training@idac.co.uk
The Workshop Examples for ‘ANSYS Workbench – Simulation Part‘ are now available in CAD file format, instead of just the Parasolid format, by downloading the following file. The CAD systems supported are Autodesk Inventor, SolidWorks and SolidEdge. The file size is 15.5[MB]: Click here for file To book scheduled courses, discuss customised courses, or to order manuals, contact Manjinder Gillett
If you would like details on our seminars please click here or email seminar@idac.co.uk Click here for further information on our current candidates. Click here for further information on our current vacancies. Junior Technical Sales Engineer required by IDAC – please click here for more information. About IDAC IDAC provides engineering analysis consultancy, Finite Element Analysis and Computational Fluid Dynamics software solutions and training. We are the leading UK provider of ANSYS, DesignSpace, LS-DYNA, AI*Solutions, ICEM CFD, CivilFEM, SAMCEF for Rotor, ESAcomp, FE WELD, Model Checker, CADfix, CFX, Sinda/G and Virtual Paintshop software. For further information click here. IDAC solutions enable validation and optimisation of product and process designs in fields such as structural performance, thermal behaviour, electromagnetic and electrostatic performance. IDAC specialises in the recruitment of analytical engineers and are always looking for engineering consultants experienced in Finite Element Analysis and/or Computational Fluid Dynamics. In addition IDAC offers vacancies from different companies. Please contact us by email with any comments or suggestions regarding eNews. To subscribe to eNews contact us with full contact details and the subject “subscribe”. IDAC Airport House Purley Way Croydon CR0 0XZ United Kingdom Tel: +44 (0) 870 160 5900 Fax: +44 (0) 870 160 5910 |
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