scholarly journals Estimation of acoustic absorption in porous materials based on visco-thermal boundary layers modeled as boundary conditions

2020 ◽  
Vol 148 (3) ◽  
pp. 1624-1635
Author(s):  
Mark J. Cops ◽  
J. Gregory McDaniel ◽  
Elizabeth A. Magliula ◽  
David J. Bamford ◽  
Martin Berggren
Keyword(s):  
Boundary Conditions ◽  
Porous Materials ◽  
Boundary Layers ◽  
Acoustic Absorption ◽  
Thermal Boundary Layers

Effects of plane progressive irrotational waves on thermal boundary layers

1971 ◽  
Vol 50 (2) ◽  
pp. 321-334 ◽  
Author(s):  
James Witting
Keyword(s):  
Boundary Layers ◽  
Deep Water ◽  
Maximum Amplitude ◽  
Capillary Waves ◽  
Temperature Gradients ◽  
Two Dimensional ◽  
Inviscid Incompressible Fluid ◽  
Mean Temperature ◽  
The Waves ◽  
Thermal Boundary Layers

The average changes in the structure of thermal boundary layers at the surface of bodies of water produced by various types of surface waves are computed. the waves are two-dimensional plane progressive irrotational waves of unchanging shape. they include deep-water linear waves, deep-water capillary waves of arbitrary amplitude, stokes waves, and the deep-water gravity wave of maximum amplitude.The results indicate that capillary waves can decrease mean temperature gradients by factors of as much as 9·0, if the average heat flux at the air-water interface is independent of the presence of the waves. Irrotational gravity waves can decrease the mean temperature gradients by factors no more than 1·381.Of possible pedagogical interest is the simplicity of the heat conduction equation for two-dimensional steady irrotational flows in an inviscid incompressible fluid if the velocity potential and the stream function are taken to be the independent variables.

Direct numerical simulation of turbulent thermal boundary layers

2000 ◽  
Vol 12 (10) ◽  
pp. 2555 ◽  
Author(s):  
Hojin Kong ◽  
Haecheon Choi ◽  
Joon Sik Lee
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Boundary Layers ◽  
Thermal Boundary Layers
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