A diffusive wetting model for water entry/exit based on the weakly-compressible SPH method

TL;DR

This paper introduces a diffusive wetting model integrated with the WCSPH method to accurately simulate water entry and exit processes, validated through various experimental comparisons.

Contribution

The paper presents a novel diffusive wetting model for WCSPH that improves simulation accuracy and versatility for water entry and exit phenomena.

Findings

Model accurately simulates water entry/exit processes.

Validated with 3D and 2D experimental comparisons.

Demonstrates improved accuracy and efficiency.

Abstract

This paper proposes a diffusive wetting model for the weakly-compressible smoothed particle hydrodynamics (WCSPH) method to simulate individual water entry/exit as well as the complete process from water entry to exit. The model is composed of a physically consistent diffusive wetting equation to describe the wetting evolution at the fluid-solid interface, a wetting-coupled identification approach to determine the type of fluid particles by taking into account the wetting degree of the contacted solid, and a numerical regularization on the fluid particles at fully wetted fluid-solid interface. The accuracy, efficiency, and versatility of the present model are validated through qualitative and quantitative comparisons with experiments, including the 3-D water entry of a sphere, the 2-D water entry/exit of a cylinder, and the complete process from water entry to exit of a 2-D cylinder.