Simulating Surface-to-Surface Radiation in COMSOL Multiphysics®
Duration: 58:28
Watch this archived webinar to learn how to model thermal radiation in the COMSOL Multiphysics® software. In this presentation, we discuss identifying when surface-to-surface radiation is important for a modeling problem, simulating thermal radiation, defining diffuse and mixed diffuse-specular surfaces, as well as describing the temperature and wavelength dependency of radiative properties for high-fidelity models.
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Chapter Selection
Introduction (0:00)
Agenda (0:37)
Importance of Surface-to-Surface Radiation in Heat Transfer (1:35)
Importance of Surface-to-Surface Radiation (2:20)
Convection and Radiation in a Light Bulb (4:46)
Outdoor Applications (5:55)
Surface-to-surface Radiation (6:39)
Electronics Cooling (8:05)
Including surface-to-surface radiation in a model (9:15)
Effect on Heat Sink Temperature (14:06)
Wavelength and temperature dependency of surface properties (15:01)
Wavelength Dependence of Radiation (15:30)
Diffuse-Gray Surface (17:31)
Solar and Ambient Bands (19:14)
General Diffuse-Spectral Surfaces (28:55)
Wavelength Dependent Surface Properties (29:38)
Mixed diffuse-specular surfaces and semitransparent layers (34:03)
Why High Fidelity Radiation ? (34:27)
Effect of Reflectivity on Radiative Intensity Distribution (35:50)
Incident Intensity on the Back Surface (36:56)
Incident Intensity on the Back Surface as a Function of rs(cut line) (38:47)
Temperature Dependent Properties (39:17)
Test Case (40:28)
Model Setup (41:54)
Efficient computation (42:29)
Surface to Ambient (42:50)
Options for Symmetry (43:47)
Using symmetries (44:35)
Wrapping Up (45:42)
Q&A (46:37)
Contact Us (56:35)