Numerical Analysis of Wind Driven Current and Mesoscale Air Flow in Coastal Region with Land Topography

J. Ocean Eng. Technol. 2006;20(5):23-29.

Lee, Seong-Dae;

Department of Civil Engineering, Halla University;

육상지형을 고려한 연안해역에서의 중규모 기상장과 취송류에 관한 수치해석

이성대;

한라대학교 토목공학과;

Keywords: Wind-generated circulation, Meso-scale air flow, Land topography, Surface heat budget, Numerical analysis

핵심용어: 취송류, 중규모지역 기상장, 육상지형, 지표면 열수지, 수치해석

Abstract

A quasi depth-varying mathematical model for wind-generated circulation in coastal areas, expressed in terms of the depth-averaged horizontal velocity components and free surface elevation was validated and used to understand the diurnal circulation process. The wind velocity is considered as a dominant factor for driving the current. In this paper, three-dimensional numerical experiments that included the land topography were used to investigate the mesoscale air flaw over the coastal regions. The surface temperature of the inland area was determined through a surface heat budget consideration with the inclusion of a layer of vegetation.A series of numerical experiments were then carried out to investigate the diurnal response of the air flaw and wind-generated circulation to various types of surface inhomogeneities.