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A systematic method for the complex walls no-slip boundary condition modeling in dissipative particle dynamics

Mehboudi, A ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1016/j.scient.2011.11.003
  3. Publisher: 2011
  4. Abstract:
  5. The dissipative particle dynamics method is an efficient method for studying the hydrodynamics of complex fluids. One of the most challenging aspects of this method appears when the solid walls exist. The solid walls disturb the homogeneity of the fluid near the wall and cause some spurious fluctuations. Thus, in recent years a large amount of effort has been devoted to solve this shortcoming. Fortunately the mentioned problem has almost been solved for the simple walls such as flat walls, circular cylinders, spheres, etc. However no systematic model has addressed the complex walls. It should be noted that almost all of the walls we deal with in practical problems such as MEMS devices, polymer and drug containers and so on have complex geometries. In the present paper, we present a systematic method for the dissipative particle dynamics simulation of complex walls based on the representation of the complex wall by means of a triangular grid. We demonstrate the validity of our model for the flow past over a circular cylinder and then we do a simulation for the flow over an airfoil. The obtained results show that this method facilitates the simulation of each arbitrary complex wall while the spurious fluctuations of density and temperature are diminished effectively near the wall
  6. Keywords:
  7. Complex fluids ; Complex geometries ; Complex wall ; Dissipative particle dynamics ; Dissipative particle dynamics method ; Dissipative particle dynamics simulation ; MEMSDevices ; No-slip ; No-slip boundary conditions ; Practical problems ; Solid wall ; Systematic method ; Systematic models ; Triangular grid ; Airfoils ; Boundary conditions ; Computer simulation ; Cylinders (containers) ; Dynamics ; Circular cylinders ; Complexity ; Dissipation ; Drug ; Flow modeling ; Homogeneity ; Hydrodynamics ; Model validation ; Numerical model ; Particle motion ; Polymer ; Slip ; Wall
  8. Source: Scientia Iranica ; Volume 18, Issue 6 , December , 2011 , Pages 1253-1260 ; 10263098 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1026309811002057