The FMM-BEM method for the 3D particulate Stokes flow. (English) Zbl 1474.76048

Selmi, Hassib; Abdelwahed, Mohamed; Hamda, Hatem; El Asmi, Lassaad

Abstr. Appl. Anal. 2014, Article ID 563603, 12 p. (2014).

Summary: This work introduces new functions based on the spherical harmonics and the solid harmonics which have been used to construct a multipole development for the 3D Stokes problem in order to reduce the operations costs in the BEM method. We show that the major properties of those functions are inherited from the solid harmonics. The contribution of this paper is the introduction of new formulas that serve to calculate the multipole moments and the transfer functions that are necessary for the schemes of order \(O(N \text{log} N)\). Moreover, new translation formulas are introduced to obtain an \(O(N)\) scheme. The error truncation of the resulting scheme is discussed. In comparison to the BEM that attains a limit storage at \(O(1 0^4)\), we present here a method based on FMM-BEM that attains a storage at a limit of \(O(1 0^6)\). The implementation of the method achieves a high accuracy level at a reasonable cost.

MSC:

76M15	Boundary element methods applied to problems in fluid mechanics
76M10	Finite element methods applied to problems in fluid mechanics
65N38	Boundary element methods for boundary value problems involving PDEs
76D07	Stokes and related (Oseen, etc.) flows
76T20	Suspensions

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