Nonlinear Variable-Diffusivity Moisture Transport in Zero Gravity Porous Media Space Applications Minnesota State University

Format:

Conference/Event

Author/Creator:

Daidžić, Nihad E., author.

Conference Name:

International Conference On Environmental Systems (2009-07-12 : Savannah, Georgia, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2009

Summary:

The mass transport in porous media for space applications is complicated by the absence of the stabilizing gravitational potential. Generally, the spatially-resolved moisture diffusivity in porous media is a function of the local saturation. Formal solutions of very few specific variable-diffusivity parabolic flows are known. We are using the finite difference numerical methods to solve the nonlinear wetting and de-wetting diffusion dynamics in microgravity conditions. Two different functional relationships between the saturation and the moisture-diffusivity were considered. The half-saturation action-radius and the zone-of-influence of the porous suction tubes on the cold-plate porous material are especially adversely affected by the exponentially changing, saturation-dependent, diffusivity. Clogging and biofouling dramatically decrease dynamic response and performance of the porous media flow

Notes:

Vendor supplied data

Publisher Number:

2009-01-2584

Access Restriction:

Restricted for use by site license