Articles — Page 5

浮云记

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随想 Reflections
PINN Ocean Flow

settings for PINN

This note introduces Ninja, PyTorch’s MPS backend, and NVIDIA DALI as tools relevant to setting up a PINN workflow. It outlines their roles and the hardware constraints to…

Fluid Mechanics
Kelvin Wedge

Surface Waves Generated by A Travelling Pressure Point

We study the free-surface response to a moving pressure point over finite depth using 2D Fourier transforms, contour deformation, and a radiation condition. By analysing poles…

Fluid Mechanics
Kelvin Wedge

Ray Geometry, and Wave Action in Uniform Currents

We summarize the ray-theoretic description of Kelvin ship waves in deep and finite depth, deriving the relationship between wavevector and wake angle, the Kelvin wedge, and the…

Fluid Mechanics
Kelvin Wedge

Phase Geometry of Ship Waves: Deriving $p=a \cos ^2 \theta$

We derive the ship-wave crest relation \(p=a \cos ^2 \theta\) in deep water from the Doppler-shifted dispersion relation and stationary-phase arguments, interpret \(a\) as an inte…

Fluid Mechanics
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