S1-1 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation SECTION 1 OVERVIEW. - презентация

1 S1-1 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation SECTION 1 OVERVIEW

2 S1-2 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation

3 S1-3 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation AGENDA DAY ONE MSC/NASTRAN Overview - Thermal analysis Linear Conduction and Nonlinear Conduction(Projects 1 and 1A) Anisotropic Material(Project 2) Free Convection (Projects 3) n DAY TWO 1D Flow network (Project 4) Coupled Advection(Project 5) Transient thermal analysis (Project 6)

4 S1-4 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation AGENDA n DAY THREE Transient Thermal analysis (Continue) Thermostat Control Directional Heat Load with radiation loss to ambient (Project 7) Enclosure Radiation (Projects 8) View factor calculation Multiple cavities Axi-symmetry view factor n DAY FOUR Thermal stress analysis SOL 101(thermal and stress analysis in one run) Restart for transient Thermal analysis Radiation Matrix

5 S1-5 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation Import solid geometry

6 S1-6 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation NASTRAN HX model n As one can see the heat flux is apply on one side with 20 Watt/in2. n The inlet fluid temp is 20 degree, and the maximum surface temp is degree.

7 S1-7 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation Thermal radiation model

8 S1-8 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation Thermal contour

9 S1-9 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation More contour

10 S1-10 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation CAPABILITIES Solution Methods Steady state Transient Heat conduction Temperature-dependent conductivity Temperature-dependent specific heat Anisotropic thermal conductivity Time-dependent internal heat generation Free convection boundaries Temperature-dependent heat transfer coefficient Time-dependent heat transfer coefficient Forced convection Tube flow field models – H(Pr,Re) Temperature-dependent fluid viscosity, density and specific heat Time-dependent mass flow rate Duct flow coupling to rectangular surface elements Radiation to space Temperature-dependent emissivity and absorptivity Time-dependent exchange Radiation enclosures Temperature-dependent emissivity Diffuse view factor calculations with self and third-body shadowing Spectral selective surfaces, emissivity is a function of wavelength

11 S1-11 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation CAPABILITIES Radiation enclosure control Multiple radiation enclosures Applied heat loads Directional heat flux Surface normal heat flux Grid point nodal power Temperature-dependent flux Time-dependent heat flux Temperature boundary conditions Specified constant temperatures for steady state and transient Specified time-varying temperatures for transient Initial conditions Starting temperatures for nonlinear steady state analyses Starting temperatures for all transient analyses

12 S1-12 NAS104, Section 1, March 2004 Copyright 2004 MSC.Software Corporation