이동하는 대기압에 의해 생성되는 장파의 모의 및 불연속면 처리가 가능한 천수방정식 모델 개발

Title
이동하는 대기압에 의해 생성되는 장파의 모의 및 불연속면 처리가 가능한 천수방정식 모델 개발
Alternative Title
Shock capturing shallow water model for long waves generated by a moving atmospheric pressure across a straight shoreline on a sloping beach
Author(s)
최영광; 서승남
Publication Year
2016-06-23
Abstract
The shock capturing numerical model based on shallow water equations is developed to predict run-up of long waves generated by a moving atmospheric pressure disturbance across a straight shoreline on a sloping beach. HLL approximate Riemann solver with the fifth order WENO scheme is used for computation of numerical flux in spatial discretization, which gives better results in comparison with TVD MUSCL type scheme. For time stepping method, the second order SSP-RK method is adopted. We conducted numerical experiments of wave propagation by a moving atmospheric pressure disturbance which is normally approached to the coastline. When the atmospheric pressure disturbance acts on the water surface, both free and forced waves are generated. And they are amplified due to shoaling and Proudman resonance. As the pressure center moves farther inland, the effects of the atmospheric pressure on the free surface motion diminish. The rebounding run-up wave radiates to all directions which are confined to the shore resulting from refraction. As time progresses, the rebounding wave splits into two waves, propagating essentially in the alongshore direction, opposite to each other. solver with the fifth order WENO scheme is used for computation of numerical flux in spatial discretization, which gives better results in comparison with TVD MUSCL type scheme. For time stepping method, the second order SSP-RK method is adopted. We conducted numerical experiments of wave propagation by a moving atmospheric pressure disturbance which is normally approached to the coastline. When the atmospheric pressure disturbance acts on the water surface, both free and forced waves are generated. And they are amplified due to shoaling and Proudman resonance. As the pressure center moves farther inland, the effects of the atmospheric pressure on the free surface motion diminish. The rebounding run-up wave radiates to all directions which are confined to the shore resulting from refraction. As time progresses, the rebounding wave splits into two waves, propagating essentially in the alongshore direction, opposite to each other.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/24684
Bibliographic Citation
The 2nd International Water Safety Symposium, pp.98, 2016
Publisher
Lifesaving
Type
Conference
Language
English
Publisher
Lifesaving
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse