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A parallel overset-curvilinear-immersed boundary framework for simulating complex 3D incompressible flows
Iman Borazjani1, Liang Ge, Trung Le
1Department of Mechanical and Aerospace Engineering, SUNY University at Bu alo, NY, USA.
Computers & Fluids
|July 9, 2013
Summary
A new overset-curvilinear immersed boundary (overset-CURVIB) method simulates complex biological flows. This versatile computational fluid dynamics approach enhances resolution for deforming bodies and multi-connected geometries.
Area of Science:
- Computational fluid dynamics
- Biomedical engineering
- Numerical analysis
Background:
- Simulating complex biological flows requires methods that handle intricate geometries and large deformations.
- Existing immersed boundary methods may face limitations with multi-connected domains and local resolution.
- General non-inertial frames of reference are crucial for versatile and efficient simulations.
Purpose of the Study:
- To develop and implement an overset-curvilinear immersed boundary (overset-CURVIB) method.
- To enhance the simulation of challenging biological flow problems with complex geometries.
- To improve local resolution near immersed boundaries for deforming bodies.
Main Methods:
- Incorporation of overset-curvilinear grids for multi-connected geometries.
- Utilizing the curvilinear immersed boundary (CURVIB) method for sharp interfaces.
- Formulation of incompressible flow equations in a general non-inertial frame.
- Development of efficient search algorithms and parallel computing strategies.
- Second-order accurate finite-volume discretization and fractional-step time integration.
- Implementation and evaluation of globally conservative interpolation strategies.
Main Results:
- The overset-CURVIB method efficiently handles multi-connected geometries and local resolution.
- Complex bodies with large deformations are accurately represented as sharp interfaces.
- Efficient parallel computing strategies facilitate information transfer among sub-domains.
- The method is verified and validated against experimental data.
- Demonstrated capabilities in simulating aquatic swimmer flows and cardiac flows.
Conclusions:
- The overset-CURVIB method provides a versatile and efficient tool for simulating complex biological flows.
- The approach effectively addresses challenges related to geometry, deformation, and resolution.
- Validated simulations show promise for applications in biomechanics and medical device design.
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