Numerical simulation of thermal convection of a viscoelastic fluid in a porous square box heated from below

2007 ◽  
Vol 19 (10) ◽  
pp. 104107 ◽  
Author(s):  
Ceji Fu ◽  
Zhiyong Zhang ◽  
Wenchang Tan
Keyword(s):  
Numerical Simulation ◽  
Viscoelastic Fluid ◽  
Thermal Convection ◽  
Square Box

Direct Numerical Simulation of Drops in Three Dimensional Viscoelastic Simple Shear Flows

2001 ◽  
Author(s):  
Shriram B. Pillapakkam ◽  
Pushpendra Singh
Keyword(s):  
Numerical Simulation ◽  
Shear Flow ◽  
Direct Numerical Simulation ◽  
Viscoelastic Fluid ◽  
Simple Shear ◽  
Polymer Concentration ◽  
Three Dimensional ◽  
Simple Shear Flow ◽  
Splitting Technique

Abstract A three dimensional finite element scheme for Direct Numerical Simulation (DNS) of viscoelastic two phase flows is implemented. The scheme uses the Level Set Method to track the interface and the Marchuk-Yanenko operator splitting technique to decouple the difficulties associated with the governing equations. Using this numerical scheme, the shape of Newtonian drops in a simple shear flow of viscoelastic fluid and vice versa are analyzed as a function of Capillary number, Deborah number and polymer concentration. The viscoelastic fluid is modeled via the Oldroyd-B model. The role of viscoelastic stresses in deformation of a drop subjected to simple shear flow and its effect on the steady state shape is analyzed. Our results compare favorably with existing experimental data and also help in understanding the role of viscoelastic stresses in drop deformation.

Direct numerical simulation of the drag-reducing turbulent boundary layer of viscoelastic fluid

2007 ◽  
Vol 19 (7) ◽  
pp. 075106 ◽  
Author(s):  
Shinji Tamano ◽  
Motoyuki Itoh ◽  
Kenichi Hoshizaki ◽  
Kazuhiko Yokota
Keyword(s):  
Numerical Simulation ◽  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Direct Numerical Simulation ◽  
Viscoelastic Fluid

Numerical simulation of viscoelastic fluid flows using a robust FVM framework on triangular grid

2016 ◽  
Vol 236 ◽  
pp. 18-34 ◽  
Author(s):  
Wen Zhou ◽  
Jie Ouyang ◽  
Xiaodong Wang ◽  
Jin Su ◽  
Binxin Yang
Keyword(s):  
Numerical Simulation ◽  
Viscoelastic Fluid ◽  
Fluid Flows ◽  
Triangular Grid
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