Author(s): Shaswat Saincher; V. Sriram

Linked Author(s):

Keywords: Wave-structure-interaction; IITM-FNPT2D; IITM-RANS3D; Fast-fictitious-domain; Moving-structures

Abstract: State-of-the-art R&D in hydro-environmental engineering demands a synergistic combination of physical and numerical modeling techniques. In this regard, the open-source CFD code IITM-RANS3D has been developed in-house at the Department of Ocean Engineering, IIT Madras. IITM-RANS3D is an application code geared toward wave-hydrodynamics and wave-structure-interaction (WSI) problems. The code is based on the Reynolds-Averaged Navier–Stokes (RANS) equations with multiple immiscible phases modeled using the volume-of-fluid (VOF) technique. For high-fidelity generation of a wide variety of waves, the code is one-way coupled with the fully nonlinear potential theory (FNPT) code IITM-FNPT2D also developed in-house at DOE, IITM. The hybrid model is capable of handling arbitrarily complex fixed/moving bodies through embedded boundary treatment based on the fast-fictitious-domain (FFD) method. In the present paper, we report on the benchmarking of IITM-RANS3D across various wave-hydrodynamics and WSI scenarios, accomplished over the course of two years. These include: solitary waves breaking over a plane-sloping beach as well as complex bathymetry, regular waves shoaling and interacting with a recurved seawall and focused waves interacting with a moving cylinder.

DOI: https://doi.org/10.1007/978-981-97-6009-1_27

Year: 2022