Efficiently and discretely modelling shallow water flows

11 Apr 2022

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Dr. Jianping Meng, Dr. Xiaojun Gu, and Prof. David  Emerson, (computational engineers at the Science and Technologies Facilities Council (STFC)) describe how their work with Mr Yunlong Fei, Dr. Peng Yong¹, and  Prof. Jianmin Zhang (at the State Key Laboratory of Hydraulics and Mountain River Engineering (SKLH), Sichuan University, China) contributes to the understanding of fluid flows present in natural disasters. The team developed software to simulate realistic flow problems such as a tsunami inundation.

​​Tsunami run-up onto a complex 3D beach

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The movie above shows a discrete Boltzmann model (DBM) simulation of a tsunami run-up onto a complex beach profile showing the 3D water height distributions at different times. (Grey denotes the sea bathymetry (surface of the underwater floors); and blue is the height of the surface of the water​)

This work complements a wave tank experiment² of a 1:400 scale model of the coastline bathymetry near Monai in Japan, Okushiri - the location of the 1993 tsunami indundation.

The developed software has been implemented in DL_MESO and is one of the codes supported by UKCOMES.                                 

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¹Dr. Yong Peng’s present address - School of Natural and Built Environment, Environmental Change and Resilience, Queens’ University Belfast 

²Liu P. L.-F, Yeh H, Synolakis C (Eds.), Advanced numerical models for simulating tsunami waves and run-up, Vol. 10. World Scientific, 2008.​​

This BBC Radio ​4 program '​The Reunion : The Boxing Day Tsunami' is a moving account of the first-hand experiences of 5 people caught-up in the 2004 tsunami​​​.

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