scholarly journals Flow boundary conditions for chain-end adsorbing polymer blends

2005 ◽  
Vol 123 (10) ◽  
pp. 104904 ◽  
Author(s):  
Xin Zhou ◽  
Denis Andrienko ◽  
Luigi Delle Site ◽  
Kurt Kremer
Keyword(s):  
Boundary Conditions ◽  
Polymer Blends ◽  
Flow Boundary

Shear flow near solids: Epitaxial order and flow boundary conditions

1990 ◽  
Vol 41 (12) ◽  
pp. 6830-6837 ◽  
Author(s):  
Peter A. Thompson ◽  
Mark O. Robbins
Keyword(s):  
Shear Flow ◽  
Boundary Conditions ◽  
Flow Boundary

Slip-flow boundary conditions for non-Newtonian lubrication layers

1999 ◽  
Vol 24 (4) ◽  
pp. 211-217 ◽  
Author(s):  
Helge I Andersson ◽  
Ole Andreas Valnes
Keyword(s):  
Boundary Conditions ◽  
Slip Flow ◽  
Flow Boundary

scholarly journals COMPUTATIONAL FLUID DYNAMICS STUDY OF PULL AND PLUG FLOW BOUNDARY CONDITION ON NASAL AIRFLOW

2013 ◽  
Vol 25 (04) ◽  
pp. 1350044 ◽  
Author(s):  
Mohammed Zubair ◽  
Vizy Nazira Riazuddin ◽  
Mohammad Zulkifly Abdullah ◽  
Ismail Rushdan ◽  
Ibrahim Lutfi Shuaib ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Boundary Condition ◽  
Computational Fluid Dynamics ◽  
Boundary Conditions ◽  
Comparative Study ◽  
Flow Model ◽  
Plug Flow ◽  
Maximum Velocity ◽  
Nasal Valve ◽  
Flow Boundary

The recent advances in the computer based computational fluid dynamics (CFD) software tools in the study of airflow behavior in the nasal cavity have opened an entirely new field of medical research. This numerical modeling method has provided both engineers and medical specialists with a clearer understanding of the physics associated with the flow in the complicated nasal domain. The outcome of any CFD investigation depends on the appropriateness of the boundary conditions applied. Most researchers have employed plug boundary condition as against the pull flow which closely resembles the physiological phenomenon associated with the breathing mechanism. A comparative study on the effect of using the plug and pull flow boundary conditions are evaluated and their effect on the nasal flow are studied. Discretization error estimation using Richardson's extrapolation (RE) method has also been carried out. The study is based on the numerical model obtained from computed tomographic data of a healthy Malaysian subject. A steady state Reynold averaged Navier–Stokes and continuity equations is solved for inspiratory flow having flow rate 20 L/min representing turbulent boundary conditions. Comparative study is made between the pull and plug flow model. Variation in flow patterns and flow features such as resistance, pressure and velocity are presented. At the nasal valve, the resistance for plug flow is 0.664 Pa-min/L and for pull flow the value is 0.304 Pa-min/L. The maximum velocity at the nasal valve is 3.28 m/s for plug flow and 3.57 m/s for pull flow model.

Surface Flow Boundary Conditions in Modeling Land Subsidence Due to Fluid Withdrawal

Ground Water ◽  
2004 ◽  
Vol 42 (4) ◽  
pp. 516-525 ◽  
Author(s):  
Domenico Bau ◽  
Massimiliano Ferronato ◽  
Giuseppe Gambolati ◽  
Pietro Teatini
Keyword(s):  
Boundary Conditions ◽  
Land Subsidence ◽  
Surface Flow ◽  
Flow Boundary
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