Porous flow model for cellular foams

1990 ◽  
Vol 25 (2) ◽  
pp. 236-239 ◽  
Author(s):  
K. B. Kann
Keyword(s):  
Flow Model ◽  
Porous Flow ◽  
Cellular Foams

Intrapleural fluid movements described by a porous flow model

1992 ◽  
Vol 73 (6) ◽  
pp. 2511-2516 ◽  
Author(s):  
G. Miserocchi ◽  
D. Venturoli ◽  
D. Negrini ◽  
M. C. Gilardi ◽  
R. Bellina
Keyword(s):  
Porous Medium ◽  
Gamma Camera ◽  
Flow Model ◽  
Pleural Space ◽  
Interstitial Tissue ◽  
Hydraulic Pressure ◽  
Pressure Gradients ◽  
Hydraulic Radius ◽  
Porous Flow ◽  
Anesthetized Dogs

We injected technetium-labeled albumin (at a concentration similar to that of the pleural fluid) in the costal region of anesthetized dogs (n = 13) either breathing spontaneously or apneic. The decay rate of labeled activity at the injection site was studied with a gamma camera placed either in the anteroposterior (AP) or laterolateral (LL) projection. In breathing animals (respiratory frequency approximately 10 cycles/min), 10 min after the injection the activity decreased by approximately 50% on AP and approximately 20% on LL imaging; in apneic animals the corresponding decrease in activity was reduced to approximately 15 and approximately 3%, respectively. We considered label translocation from AP and LL imaging as a result of bulk flows of liquid along the costomediastinal and gravity-dependent direction, respectively. We related intrapleural flows to the hydraulic pressure gradients existing along these two directions and to the geometry of the pleural space. The pleural space was considered as a porous medium partially occupied by the mesh of microvilli protruding from mesothelial cells. Solution of the Kozeny-Carman equation for the observed flow velocities and pressure gradients yielded a mean hydraulic radius of the pathways followed by the liquid ranging from 2 to 4 microns. The hydraulic resistivity of the pleural space was estimated at approximately 8.5 x 10(5) dyn.s.cm-4, five orders of magnitude lower than that of interstitial tissue.

3D SPH porous flow model for wave interaction with permeable structures

2018 ◽  
Vol 75 ◽  
pp. 223-233 ◽  
Author(s):  
Hongjie Wen ◽  
Bing Ren ◽  
Guoyu Wang
Keyword(s):  
Flow Model ◽  
Wave Interaction ◽  
Porous Flow

A porous-flow model of flank eruptions on Mount Etna

1992 ◽  
Vol 49 (3-4) ◽  
pp. 349-363 ◽  
Author(s):  
Maurizio Bonafede ◽  
Enzo Boschi
Keyword(s):  
Flow Model ◽  
Mount Etna ◽  
Porous Flow ◽  
Flank Eruptions

scholarly journals Porous parachute modelling with an Euler-Lagrange coupling

2007 ◽  
pp. 385-399
Author(s):  
Nicolas Aquelet ◽  
Jason Wang
Keyword(s):  
Porous Medium ◽  
Flow Model ◽  
Test Case ◽  
Element Formulation ◽  
Porous Flow ◽  
Air Stream ◽  
Thin Porous Media ◽  
Coupling Force ◽  
Lagrangian Finite Element ◽  
Updated Lagrangian

A newly developed approach for tridimensional fluid-structure interaction with a deformable thin porous media is presented. The method presented couples a Arbitrary Lagrange Euler formulation for the fluid dynamics and a updated Lagrangian finite element formulation for the thin porous medium dynamics. The interaction between the fluid and porous medium are handled by a Euler-Lagrange coupling, for which the fluid and structure meshes are superimposed without matching. The coupling force is computed with an Ergun porous flow model. As test case, the method is applied to an anchored air parachute placed in an air stream.

A Porous Flow Model for Steady State Transport of Radium in Groundwater

1986 ◽  
Vol 22 (1) ◽  
pp. 34-44 ◽  
Author(s):  
M. R. Davidson ◽  
B. L. Dickson
Keyword(s):  
Steady State ◽  
Flow Model ◽  
Porous Flow
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