Generalizing Shallow Water Simulations with Dispersive Surface Waves
Article No.: 83, Pages 1 - 12
Abstract
This paper introduces a novel method for simulating large bodies of water as a height field. At the start of each time step, we partition the waves into a bulk flow (which approximately satisfies the assumptions of the shallow water equations) and surface waves (which approximately satisfy the assumptions of Airy wave theory). We then solve the two wave regimes separately using appropriate state-of-the-art techniques, and re-combine the resulting wave velocities at the end of each step. This strategy leads to the first heightfield wave model capable of simulating complex interactions between both deep and shallow water effects, like the waves from a boat wake sloshing up onto a beach, or a dam break producing wave interference patterns and eddies. We also analyze the numerical dispersion created by our method and derive an exact correction factor for waves at a constant water depth, giving us a numerically perfect re-creation of theoretical water wave dispersion patterns.
Supplementary Material
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Index Terms
- Generalizing Shallow Water Simulations with Dispersive Surface Waves
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Published: 26 July 2023
Published in TOG Volume 42, Issue 4
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