Application of Immersed-Boundary Method to Complex Geometry Flows With Heat Transfer

2011 ◽  
Author(s):  
Chuan-Chieh Liao ◽  
Chao-An Lin
Keyword(s):  
Heat Transfer ◽  
Boundary Conditions ◽  
Immersed Boundary Method ◽  
Complex Geometry ◽  
Immersed Boundary ◽  
Boundary Method ◽  
Concentric Cylinders ◽  
Temperature Boundary ◽  
Nonstationary Boundary ◽  
Good Agreement

In the present study, an immersed-boundary method is adopted to simulate natural and forced convection within a domain with complex geometry. The method is based on the direct momentum and energy forcing on a Cartesian grid and issues involving implementation of both the thermal (Dirichlet and Neumann) and dynamic (stationary and nonstationary) boundary conditions are addressed. The second order accuracy of the present method was validated based on natural convection in an annulus between horizontal concentric cylinders. Simulations of flow over a stationary cylinder with heat convection were further conducted to validate the capability of present technique for both temperature boundary conditions. Finally, the influence of the lock-on phenomenon in heat transfer is investigated for flow over a transversely oscillating cylinder. All computed results are in generally good agreement with previous experimental measurements and numerical simulations.

scholarly journals Immersed Boundary Method for Liquid-Solid Two-Phase Flow with Heat Transfer

2011 ◽  
Vol 77 (775) ◽  
pp. 803-814 ◽  
Author(s):  
Atsushi UEYAMA ◽  
Satoshi MORIYA ◽  
Mariko NAKAMURA ◽  
Takeo KAJISHIMA
Keyword(s):  
Heat Transfer ◽  
Immersed Boundary Method ◽  
Two Phase Flow ◽  
Immersed Boundary ◽  
Phase Flow ◽  
Two Phase ◽  
Boundary Method

Computation of Turbulent Flows in Complex and Moving Geometries Using Immersed Boundary Method

2003 ◽  
Author(s):  
Mayank Tyagi ◽  
Sumanta Acharya
Keyword(s):  
Turbulent Flows ◽  
Immersed Boundary Method ◽  
Complex Geometry ◽  
Fluid Motion ◽  
The Body ◽  
Immersed Boundary ◽  
Full Potential ◽  
Heated Cylinder ◽  
Boundary Method ◽  
Trapped Vortex

A solution methodology for complex turbulent flows of industrial interests is developed using Immersed Boundary Method (IBM). IBM combines the efficiency inherent in using a fixed Cartesian grid to compute the fluid motion, along with the ease of tracking the immersed boundary at a set of moving Lagrangian points. IBM relies upon the body force terms added in the momentum equations to represents the complex geometry on a fixed Cartesian mesh. Resolution issues for turbulent flows can be addressed by Large Eddy Simulation (LES) technique provided an accurate and robust Subgrid Stress (SGS) model is available. Higher order of numerical accuracy schemes for turbulent flows can be maintained as well as the geometrical complexities can be rendered physically by combining LES with IBM. The proposed methodology is simple and ideally suited for the moving geometries involving no-slip walls with prescribed trajectories and locations. IBM is validated for the laminar flow past a heated cylinder in a channel and LES is validated for the turbulent lid-driven cavity flow. LES-IBM is then is used to render complex geometry of trapped vortex combustor to study fluid mixing inside trapped vortex cavity. To demonstrate the full potential of LES-IBM, a complex moving geometry problem of stator-rotor interaction is solved.

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