An Open Boundary Condition with Application in Internal Tide Simulation

doi:10.19596/j.cnki.1001-246x.8014

Abstract

Abstract: A clamped radiation boundary condition is proposed. Clamped radiation condition can be used as both active and passive open boundary conditions (OBCs), and can be used in simulating tides and other oceanic dynamic processes. Several OBCs were compared in a layered internal tide model with mode-split technique. In external mode, Dirchlet condition, clamped radiation condition, Flather condition and relaxation condition were compared. It shows that performance of clamped radiation condition and Flather condition is the best, but clamped radiation needs less data than Flather contidion, and hence can be applied more widely. In internal mode, relaxation condition, Sommerfeld radiation condition and Sommerfeld radiation condition based on normal mode were compared. It shows that relaxation condition is the best.

Key words: open boundary condition, internal tide, layered model

CLC Number:

P731.23

MIAO Chunbao, WU Lidan. An Open Boundary Condition with Application in Internal Tide Simulation[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2020, 37(2): 163-172.

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