scholarly journals Flow visualization of an N95 respirator with and without an exhalation valve using schlieren imaging and light scattering

2020 ◽  
Vol 32 (11) ◽  
pp. 111703
Author(s):  
Matthew Staymates
Keyword(s):  
Light Scattering ◽  
Flow Visualization ◽  
Schlieren Imaging ◽  
Exhalation Valve

Flow Regimes and Transitions in a Rapid Chemical Vapor Deposition Reactor Using Flow Visualization and Rayleigh Light Scattering

2000 ◽  
Author(s):  
Angelo G. Mathews ◽  
Jill E. Peterson
Keyword(s):  
Light Scattering ◽  
Flow Visualization ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Flow Regimes ◽  
Rayleigh Light Scattering ◽  
Flow Visualizations ◽  
Transition Points ◽  
Stable Flow ◽  
Rayleigh Light

Abstract Previous study of carrier gas flow in rapid chemical vapor deposition (RCVD) reactors has been limited mostly to numerical simulations and flow visualizations. In the present work flow regimes were observed and temperatures were measured in a vertical axisymmetric pedestal RCVD reactor using flow visualization and Rayleigh light scattering (RLS) for noninvasive temperature measurement. Flow visualizations revealed that the flow undergoes complex transitions between stable flow regimes as heating occurs. The two dominant stable flow regimes were buoyant stable (BS) and momentum stable (MS). RLS was used to determine the instantaneous carrier gas temperature at discrete points in the test section. The flow regimes and their transition points were easily recognized and agreed with flow visualization data. The flow visualizations and RLS tests showed identifiable trends in transition points between flow regimes and in the types of regimes encountered. These trends were dependent on Grashof number and Reynolds number.

Collision induced hyper-Rayleigh light scattering in CCl4

1996 ◽  
Vol 88 (3) ◽  
pp. 683-691 ◽  
Author(s):  
P. KAATZ ◽  
D.P. SHELTON
Keyword(s):  
Light Scattering ◽  
Rayleigh Light Scattering ◽  
Rayleigh Light
Sign in / Sign up

Export Citation Format

Share Document