An immersed boundary method for computational simulation of red blood cell  in poiseuille flow

Esmaily, Reza; Pourmahmoud, Nader; Mirzaee, Iraj

doi:10.5755/j01.mech.24.3.18063

Cited by 2 publications

(1 citation statement)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen from Figure 13 that the velocity of the fluid increases in the stenosis area, resulting in more deformation of the RBCs [39]. After passing through this area, the RBCs return to their initial shape due to the decrease in the velocity of the fluid.…”

Section: Applicationmentioning

confidence: 98%

The Immersed Boundary-Lattice Boltzmann Method Parallel Model for Fluid-Structure Interaction on Heterogeneous Platforms

Liu

Huang

et al. 2020

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Immersed boundary-lattice Boltzmann method (IB-LBM) has become a popular method for studying fluid-structure interaction (FSI) problems. However, the performance issues of the IB-LBM have to be considered when simulating the practical problems. The Graphics Processing Units (GPUs) from NVIDIA offer a possible solution for the parallel computing, while the CPU is a multicore processor that can also improve the parallel performance. This paper proposes a parallel algorithm for IB-LBM on a CPU-GPU heterogeneous platform, in which the CPU not only controls the launch of the kernel function but also performs calculations. According to the relatively local calculation characteristics of IB-LBM and the features of the heterogeneous platform, the flow field is divided into two parts: GPU computing domain and CPU computing domain. CUDA and OpenMP are used for parallel computing on the two computing domains, respectively. Since the calculation time is less than the data transmission time, a buffer is set at the junction of two computational domains. The size of the buffer determines the number of the evolution of the flow field before the data exchange. Therefore, the number of communications can be reduced by increasing buffer size. The performance of the method was investigated and analyzed using the traditional metric MFLUPS. The new algorithm is applied to the computational simulation of red blood cells (RBCs) in Poiseuille flow and through a microchannel.

show abstract

Section: Applicationmentioning

confidence: 98%

The Immersed Boundary-Lattice Boltzmann Method Parallel Model for Fluid-Structure Interaction on Heterogeneous Platforms

Liu

Huang

et al. 2020

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

Simulation of the dynamic flow field in the left ventricle of the heart during diastolic filling

et al. 2020

View full text Add to dashboard Cite

Fluid–structure interaction (FSI) problems in modeling flexible structures and moving boundaries can be simulated by combining the immersed boundary (IB) method and the Lattice–Boltzmann (LB) method. In this paper, we propose an FSI model of mitral valve leaflets and the left ventricle to simulate the flow field in the left ventricle during diastolic filling based on an IB–LB coupling scheme. Changes in the flow field and mitral valve leaflets in the FSI model are simulated with the IB–LB method, in which two arc-shaped flexible fibers simulate mitral valve leaflets immersed in the flow field. At the same time, a semi-elliptical model is used to simulate the left ventricle, which is simplified as a rigid boundary. The LB method is used to solve the Newtonian flow field, and the IB method is used to simulate the deformation of the flexible fiber interacting with the flow. In this paper, we introduce the basic principles underlying the combination of the LB and the IB methods and elucidate the coupling frame and the left ventricular flow model in detail. Finally, we verify the effectiveness of the coupled models by simulating the effects of diastolic jet flow on the motion of the mitral leaflets in the simplified left ventricular flow model.

show abstract

An immersed boundary method for computational simulation of red blood cell in poiseuille flow

Cited by 2 publications

References 24 publications

The Immersed Boundary-Lattice Boltzmann Method Parallel Model for Fluid-Structure Interaction on Heterogeneous Platforms

The Immersed Boundary-Lattice Boltzmann Method Parallel Model for Fluid-Structure Interaction on Heterogeneous Platforms

Simulation of the dynamic flow field in the left ventricle of the heart during diastolic filling

Contact Info

Product

Resources

About