Accession Number:

ADA172155

Title:

Unsteady Gas Diffusion Across a Two-Dimensional Permeable Cavity Surface

Descriptive Note:

Technical memo.

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB

Personal Author(s):

• Ravindra, K.

Report Date:

1986-07-31

Pagination or Media Count:

30.0

Abstract:

A mathematical analysis is formulated and solved for the unsteady diffusion of gases across a two dimensional cavity surface. The analysis takes into account the effect of variations in cavity length as well as cavity pressure on the unsteady gaseous diffusion. The result of this mathematical analysis approaches the proper limit for steady gas diffusion across a two dimensional cavity surface when the reduced frequency of oscillation goes to zero. Keywords Unsteady gaseous diffusion Cavity length.

Descriptors:

• *DIFFUSION
• FREQUENCY
• STEADY STATE
• PERMEABILITY
• TWO DIMENSIONAL
• TURBULENT FLOW
• CAVITIES
• GASES
• REDUCTION
• CAVITATION
• VARIABLE PRESSURE
• INCOMPRESSIBLE FLOW
• OSCILLATION
• DIFFUSIVITY
• TWO DIMENSIONAL FLOW
• SURFACES
• MASS FLOW
• FLOW RATE
• MATHEMATICAL PREDICTION
• MATHEMATICAL ANALYSIS
• LENGTH
• PRESSURE

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE