DOI QR코드

DOI QR Code

이동격자계에서 분리유한요소법에 의한 운동에너지 보존 알고리듬

성재용;최형권;유정열
Seong, Jae-Yong;Choe, Hyeong-Gwon;Yoo, Jung-Yul

  • 발행 : 1997.11.01

초록

Kinetic energy conservation for fixed and moving grids is examined in time-accurate finite element computation of fully unsteady inviscid flows. As numerical algorithms, fractional step method (FSM) and modified SIMPLE are used. To simulate the flow in moving grid system, arbitrary Lagrangian-Eulerian (ALE) method is adopted. In the present study, the energy conserving time integration rule for finite element algorithm is proposed and discussed schematically. It is shown that the discretization by Crank-Nicolson in time and Galerkin (central difference) in space must be used to ensure energy conservation. The developed code has been tested for a standing vortex in fixed or moving grid system, sloshing in a tank and propagation of a solitary wave, and has been shown to be a completely energy conserving algorithm.

키워드

자유표면;에너지 보존;이동격자계;분리유한요소법