Modification and expansion of the generalized soft-sphere model to high temperature based on collision integrals

2008 ◽  
Vol 20 (1) ◽  
pp. 017105 ◽  
Author(s):  
Jae Gang Kim ◽  
Oh Joon Kwon ◽  
Chul Park
Keyword(s):  
High Temperature ◽  
Sphere Model ◽  
Collision Integrals ◽  
Soft Sphere

Virial coefficients, equation of state, and solid–fluid coexistence for the soft sphere model

2011 ◽  
Vol 109 (1) ◽  
pp. 123-132 ◽  
Author(s):  
Tai Boon Tan ◽  
Andrew J. Schultz ◽  
David A. Kofke
Keyword(s):  
Equation Of State ◽  
Virial Coefficients ◽  
Sphere Model ◽  
Soft Sphere

scholarly journals Direct numerical simulation of pattern formation in subaqueous sediment

2014 ◽  
Vol 750 ◽  
Author(s):  
Aman G. Kidanemariam ◽  
Markus Uhlmann
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Propagation Speed ◽  
Immersed Boundary ◽  
Flow Conditions ◽  
Sphere Model ◽  
Soft Sphere ◽  
Sediment Bed ◽  
Fluid Bed ◽  
Two Parameter

AbstractWe present results of direct numerical simulation of incompressible fluid flow over a thick bed of mobile spherically shaped particles. The algorithm is based upon the immersed-boundary technique for fluid–solid coupling and uses a soft-sphere model for the solid–solid contact. Two parameter points in the laminar flow regime are chosen, leading to the emergence of sediment patterns classified as ‘small dunes’, while one case under turbulent flow conditions leads to ‘vortex dunes’ with significant flow separation on the lee side. The wavelength, amplitude and propagation speed of the patterns extracted from the spanwise-averaged fluid–bed interface are found to be consistent with available experimental data. The particle transport rates are well represented by available empirical models for flow over a plane sediment bed in both the laminar and the turbulent regimes.

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