پاورپوینت کامل Introduction to the ansys meshing application chapter 2 47 اسلاید در PowerPoint

توجه : این فایل به صورت فایل power point (پاور پوینت) ارائه میگردد

 پاورپوینت کامل Introduction to the ansys meshing application chapter 2 47 اسلاید در PowerPoint دارای ۴۷ اسلاید می باشد و دارای تنظیمات کامل در PowerPoint می باشد و آماده ارائه یا چاپ است

شما با استفاده ازاین پاورپوینت میتوانید یک ارائه بسیارعالی و با شکوهی داشته باشید و همه حاضرین با اشتیاق به مطالب شما گوش خواهند داد.

لطفا نگران مطالب داخل پاورپوینت نباشید، مطالب داخل اسلاید ها بسیار ساده و قابل درک برای شما می باشد، ما عالی بودن این فایل رو تضمین می کنیم.

توجه : در صورت  مشاهده  بهم ریختگی احتمالی در متون زیر ،دلیل ان کپی کردن این مطالب از داخل فایل می باشد و در فایل اصلی پاورپوینت کامل Introduction to the ansys meshing application chapter 2 47 اسلاید در PowerPoint،به هیچ وجه بهم ریختگی وجود ندارد

بخشی از مطالب داخلی اسلاید ها

پاورپوینت کامل Introduction to the ansys meshing application chapter 2 47 اسلاید در PowerPoint

اسلاید ۴: What is the “ANSYS Meshing Application”ANSYS has been working to integrate “best in class” technologies from several sources:ICEM CFD TGridGAMBITCFXANSYS Prep/PostEtc.

اسلاید ۵: ANSYS Meshing Application OverviewThe objective of the ANSYS Meshing Application in Workbench is to provide access to common ANSYS Inc. meshing tools in a single location, for use by any analysis type: FEA SimulationsMechanical Dynamics SimulationExplicit Dynamics SimulationAUTODYNANSYS LS DYNAElectromagnetic SimulationCFD SimulationANSYS CFXANSYS FLUENT

اسلاید ۶: Mesh SpecificationPurposeFor both CFD (fluid) and FEA (solid) modelling, the software performs the computations at a range of discrete locations within the domain. The purpose of meshing is to decompose the solution domain into an appropriate number of locations for an accurate result.The basic building-blocks for a 3D mesh are:Manifold Example: Outer casting and internal flow region are meshed for coupled thermal/stress gas flow simulationTetrahedrons(unstructured)Hexahedrons(usually structured)Prisms (formed when a tet mesh is extruded)Pyramids (where tet. and hex. cells meet)

اسلاید ۷: Mesh SpecificationConsiderationsDetail: How much geometric detail is relevant to the simulation physics.Including unnecessary detail can greatly increase the effort required for the simulation.RefinementWhere in the domain are the most complex stress/flow gradients These areas will require higher densities of mesh elements.Is it necessary to resolve this recessExtra mesh applied across fluid boundary layerRefined mesh around bolt-hole

اسلاید ۸: Mesh SpecificationEfficiencyGreater numbers of elements require more compute resource (memory / processing time). Balance the fidelity of the simulation with available resources.

اسلاید ۹: Mesh SpecificationQualityIn areas of high geometric complexity mesh elements can become distorted. Poor quality elements can lead to poor quality results or, in some cases, no results at all!There are a number of methods for measuring mesh element quality (mesh metrics*). For example, one important metric is the element ‘Skewness’. Skewness is a measure of the relative distortion of an element compared to its ideal shape and is scaled from 0 (Excellent) to 1 (Unacceptable).0-0.25 0.25-0.50 0.50-0.80 0.80-0.95 0.95-0.98 0.98-1.00Excellent very good good acceptable bad Unacceptable*Further information on mesh metrics is available in the documentation and training lecture appendices

اسلاید ۱۰: Mesh SpecificationThis example illustrates an unconverged thermal field in a manifold solid casting. On closer inspection it is clear that the simulation is unable to resolve a sensible data field in the region of poor quality elements.The example with good quality elements demonstrates no problems in the solution field. The ANSYS Meshing Application provides many tools to help maximise mesh quality Example showing difference between good and poor meshes:

اسلاید ۱۱: FEA Meshing IssuesStructural FEARefine mesh to capture gradients of concernE.g. temperature, strain energy, stress energy, displacement, etc.tet mesh dominated, but hex elements still preferredsome explicit FEA solvers require a hex mesh tet meshes for FEA are usually second order (include mid-side nodes on element edges)

اسلاید ۱۲: CFD Meshing IssuesCFDRefine mesh to capture gradients of concernE.g. Velocity, pressure, temperature, etc.Mesh quality and smoothness critical for accurate results This leads to larger mesh sizes, often millions of elementstet mesh dominated, but hex elements still preferredtet meshes for CFD are usually first order (no mid-side nodes on element edges)

اسلاید ۱۳: Mesh TypesTet Mesh and Tet/Prism hybrid

اسلاید ۱۴: Mesh TypesHex Mesh

اسلاید ۱۵: Mesh TypesTet Mesh1) Can be generated quickly, automatically, and for complicated geometryMesh can be generated in 2 steps:Step 1: Define element sizingStep 2: Generate Mesh

اسلاید ۱۶: Mesh TypesTet Mesh2) Isotropic refinement – in order to capture gradients in one direction, mesh is refined in all three directions – cell counts rise rapidlyPerforated plate resulting in pressure drop in x directioپاورپوینت کامل Introduction to the ansys meshing application chapter 2 47 اسلاید در PowerPoint

اسلاید ۱۷: Mesh TypesTet Mesh3) Inflation layer helps with refinement normal to the wall, but still isotropic in 2-D (surface mesh)

اسلاید ۱۸: Mesh TypesHex MeshFewer elements required to resolve physics for most CFD applications This hexahedral mesh, which provides the same resolution of flow physics, has LESS than half the amount of nodes as the tet-mesh)TETHEX

اسلاید ۱۹: Mesh TypesHex MeshFewer elements required to resolve physics for most CFD appli