This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. International Journal for Numerical Methods in Fluids, which has been published in final form at. Variable Spaced Particle in Meshfree Method to handle wave‐floating body interactions. This is the peer reviewed version of the following article: Rijas, A. The application of the method for wave impact load from the green water loading of the floating structure is also simulated. Based on this, the performance of the variable spaced particle distribution is tested in coupling with floating body solver. Two test cases, one with small wave and another with steep waves, are simulated for uniform particle distribution and the result shows good agreement with literature. These approaches are given in more detail in Li & Lius book Meshfree Particle. An iterative scheme to handle the wave‐floating body is implemented in the particle method. Numerical schemes to handle variable resolutions are reported. To improve the computational efficiency and capture the body response properly, variable spaced particle distribution with fine resolution near the floating body and coarse resolution far from the body is implemented. However, many existing particle methods are computationally intensive to model the wave‐floating body due to the requirement of fine particles, needing uniform distribution throughout the domain. The IMLPG_R method is a particle method that solves Navier–Stokes equations using the fractional step method to capture the wave properties. In this work, the motion of a two‐dimensional rectangular freely floating body under waves is simulated using Improved Meshless Local Petrov‐Galerkin method with Rankine Source function (IMLPG_R) with variable spacing resolutions.
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