서우석 최근혁 김성진 신승원 2024-01-19T08:33:09Z 2024-01-19T08:33:09Z 2023-11-02 2023-09 1598-6071 https://pubs.kist.re.kr/handle/201004/113259 Calculating the flow field with complex geometry is one of the essential features of computational fluid dynamics. For finite volume formulation, a body fitted grid was usually utilized for such geometry. However, the immersed boundary method has become very popular these days since it can be applicable to a simple Cartesian coordinate system which uses finite difference schemes. It becomes much more effective along with two-phase flow modeling which is using continuous surface tension source formulation (CSF). There are several options for the immersed boundary techniques. Here, we are focused on the direct forcing method which is basically a ghost type approach. We tried to check the accuracy depending on forcing methods. Several forcing methods have been tested including linear velocity interpolation, stepwise or heaviside velocity filtering for the ghost nodes. We also tested a volume weighted velocity filtering approach for increased accuracy. For the benchmarking test, a flow field around the cylinder has been selected for comparison of the accuracy of different formulations. Korean 한국전산유체공학회 가상경계법의 모델링 방법에 따른 실린더 주변유동의 정확성 검증 ACCURACY OF THE FLOW FIELD AROUND A CYLINDER FROM VARIOUS IMMERSED BOUNDARY FORMULATION Article 10.6112/kscfe.2023.28.3.027 2 한국전산유체공학회지, v.28, no.3, pp.27 - 34 한국전산유체공학회지 28 3 27 34 N kci ART003001128 가상경계법(Immersed Boundary Method) 직접강제방법(Direct Forcing) 유한차분(finite difference) 속도보간(Velocity Interpolation) 벤치마킹(Benchmarking)