Szczegóły publikacji
Opis bibliograficzny
On optimal node spacing for immersed boundary-lattice Boltzmann method in 2D and 3D / Radek Fučík, Pavel Eichler, Robert STRAKA, Petr Pauš, Jakub Klinkovský, Tomáš Oberhuber // Computers and Mathematics with Applications ; ISSN 0898-1221. — 2019 — vol. 77 iss. 4, s. 1144-1162. — Bibliogr. s. 1161-1162, Abstr. — Publikacja dostępna online od: 2018-11-13
Autorzy (6)
- Fučík Radek
- Eichler Pavel
- AGHStraka Robert
- Pauš Petr
- Klinkovský Jakub
- Oberhuber Tomáš
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 121261 |
|---|---|
| Data dodania do BaDAP | 2019-06-05 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.camwa.2018.10.045 |
| Rok publikacji | 2019 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Computers & Mathematics with Applications |
Abstract
A computational study on optimal spacing of Lagrangian nodes discretizing a rigid and immobile immersed body boundary in 2D and 3D is presented in order to show how the density of the Lagrangian points affects the numerical results of the Immersed Boundary-Lattice Boltzmann Method (IB-LBM). The study is based on the implicit velocity correction-based IB-LBM proposed by Wu and Shu (2009, 2010) that allows computing the fluid-body interaction force. However, the (original) method fails for densely spaced Lagrangian points due to ill-conditioned or even singular linear systems that arise from the derivation of the method. We propose a modification that improves the solvability of the linear systems and compare the performance of both methods using several benchmark problems. The results show how the spacing of the Lagrangian points affects the numerical results, mainly the permeability of the discretized body boundary in applications to fluid flows over rigid obstacles and blood flows in arteries in 2D and 3D. (C) 2018 Elsevier Ltd. All rights reserved.
