26 Result(s)
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Article
Wei-wen Zhao
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Article
Development of naoe-FOAM-SJTU solver based on OpenFOAM for marine hydrodynamics
A CFD solver naoe-FOAM-SJTU (The abbreviation naoe stands for naval architecture and ocean engineering) is developed based on the open source platform OpenFOAM with the purpose of simulating various marine hyd...
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Vortex identification methods in marine hydrodynamics
In this paper, several commonly used vortex identification methods for marine hydrodynamics are revisited. In order to extract and analyse the vortical structures in marine hydrodynamics, the Q, λ2 — criterion an...
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MPS Method for Interaction Between Solitary Waves and Submerged Horizontal Plate
The interaction between structure and wave is a typical phenomenon in naval architecture and ocean engineering. In this paper, numerical simulation is carried out to study the interaction between a two-dimensi...
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CFD simulations of three-dimensional violent sloshing flows in tanks based on MPS and GPU
For violent sloshing, the flow field becomes complicated and 3-D effect is non-negligible. In addition to the excitation direction, the wave can also propagate perpendicular to the excitation direction. Due to...
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Numerical simulations of propeller cavitation flows based on OpenFOAM
In order to study the cavitation and hydrodynamic characteristics of propeller under uniform and non-uniform flows, numerical investigations are performed using interPhaseChangeDyMFoam in the open source compu...
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Parametric study of Liutex-based force field models
The motion of fluid consists of different scales of coherent vortical structures. These vortical structures determine the characteristics of fluid motion and are key to understand fluid dynamics. In this paper...
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Liutex-based vortex control with implications for cavitation suppression
Viewed as sinews and muscles of fluid motion, coherent vortical structures with their interactions are key to understanding the flow dynamics. Based upon this observation, we explore the possibility of efficie...
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Liutex force field model applied to three-dimensional flows around a circular cylinder at Re = 3 900
Recently, the Liutex-based force field models are proposed and applied to some two-dimensional flows to explore the possibility of direct vortex control strategies. In this paper, we applied the Liutex-based c...
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Liutex-based centripetal force field model for improving the resistance and wake performances of JBC ship sailing in calm water
For complex aerodynamic and hydrodynamic problems, the analysis of vortex is very important. The Liutex method is an eigenvalue-based method which is local, accurate, and unique, which can give an accurate def...
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Applications of Liutex-based force field models for cavitation simulation
When studying the flow dynamics and the characteristics of fluid motion, vortex structure with their interactions is the key issue. In the present work, a vortex control method is investigated based on the vor...
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Optimization of the roll motion of box-shaped hull section with anti-rolling sloshing tanks and fins in beam waves
With the development of ocean engineering and demand for safety of the ship and offshore structures, the transportation and storage of liquid have become an important issue nowadays. Furthermore, in order to i...
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Numerical simulations of multi-layer-liquid sloshing by multiphase MPS method
In this paper, a multiphase moving particle semi-implicit (MPS) method is developed by introduction of various multiphase models into the original MPS method for single-phase flows, and is then applied to the ...
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Numerical study of free end effect of cylinder with low aspect ratios on vortex induced motion
In this paper, numerical simulation is conducted via our in-house solver, vim-FOAM-SJTU, developed on open-source software, OpenFOAM. Flow around static rigid cylinders and elastically mounted rigid cylinder c...
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Numerical simulations of sloshing waves in vertically excited square tank by improved MPS method
Faraday wave is a phenomenon of sloshing due to a heave motion of a partially filled tank, which is also called parametric instability or parametric resonance. In the present paper, the phenomenon of faraday w...
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Vortex structures of dynamic pure yaw test using DDES approach and vortex identification method
Considered as the building blocks, vortex structures with variety of sizes and intensity are widely recognized in the viscous flow field around ship. In this paper, the computational fluid dynamics (CFD) solve...
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Article
Numerical investigation on the effects of current headings on vortex induced motions of a semi-submersible
In this paper, numerical simulations on vortex-induced motions (VIM) of a semi-submersible at two different current headings are conducted over a wide range of current velocities. The simulations are performed...
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An overview of flow field computational methods for hydrodynamic noise prediction
Recently, the hydrodynamic noise is becoming a research hotspot because it not only affects the concealment and comfort of ships, but also affects the living condition of underwater mammals. Accurate predictio...
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Article
Omega-Liutex method for the interaction among wave, current and fixed vertical cylinder
This paper presents a numerical investigation of the interaction among wave, flow and a fixed cylinder using the naoe-FOAM-SJTU solver, which is a viscous solver for hydrodynamics based on OpenFOAM. The simula...
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Numerical simulations of faraday waves in cylindrical and hexagonal tanks based on MPS method
When a partially loaded liquid container vibrates along the vertical direction, the liquid inside will oscillate regularly, which is called Faraday wave. In some cases, the wave form of the Faraday wave is sta...
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Article
Wall-modeled large eddy simulation for the flows around an axisymmetric body of revolution
The flow around an axisymmetric body of revolution (DARPA SUBOFF bare model) at Re = 1.2 × 107 is numerically investigated using the wall-modeled large eddy simulation (WMLES). To evaluate the capabilities of WML...
