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Development of mass-source function based numerical wave tank (NWT)algorithms in the Navier-Stokes (NSE) framework is impeded by multiple designissues such as: (a) optimization of a number of variables characterizing thesource region, (b) wave-vorticity interactions and (c) a mandatory requirementof modeling the domain on both sides of the wavemaker. In this paper, wecircumvent these hurdles by proposing a volume-preserving inflow-boundary basedNavier-Stokes wave tank. Wave generation and propagation is modeled in atwo-phase PLIC-VOF set-up. Near-exact volume preservation is achieved (atarbitrarily large steepness) using kinematic stretching that is aimed towardsbalancing the streamwise momentum between points lying above and below thestill water level. Numerical damping of steep waves is prevented by usingblended third-order and limiter schemes for momentum advection. In addition, amesh stair-stepping strategy has been adopted for modeling non-Cartesianimmersed boundaries on a staggered variable arrangement. The proposed NWT modelis rigorously benchmarked against various wave-propagation scenarios. Theseinclude the simulation of: (a) monochromatic waves of various steepnesses, (b)monochromatic waves superimposed with free harmonics, (c) irregular waves indeep water and (d) wave transformation occurring over a submerged trapezoidalbar. Excellent agreement with analytical, numerical and experimental data isreported with both validation as well as verification of the proposed NWT modelbeing established.

An inflow-boundary-based Navier-Stokes wave tank: verification and validation for waves propagating over flat and inclined bottoms