On some approaches for a free surface fluid flows modeling

2018 ◽  
Author(s):  
V. A. Gushchin ◽  
V. G. Kondakov
Keyword(s):  
Free Surface ◽  
Fluid Flows

An implicit scheme for simulation of free surface non-Newtonian fluid flows on dynamically adapted grids

2021 ◽  
Vol 36 (3) ◽  
pp. 165-176
Author(s):  
Kirill Nikitin ◽  
Yuri Vassilevski ◽  
Ruslan Yanbarisov
Keyword(s):  
Free Surface ◽  
Numerical Model ◽  
Newtonian Fluid ◽  
Viscoelastic Fluid ◽  
Fluid Flows ◽  
Numerical Results ◽  
Implicit Scheme ◽  
New Approach

Abstract This work presents a new approach to modelling of free surface non-Newtonian (viscoplastic or viscoelastic) fluid flows on dynamically adapted octree grids. The numerical model is based on the implicit formulation and the staggered location of governing variables. We verify our model by comparing simulations with experimental and numerical results known from the literature.

Numerical Simulation of Vortex Shedding From a Circular Cylinder in the Presence of a Free Surface

2003 ◽  
Author(s):  
S. Nagaya ◽  
R. E. Baddour
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Free Surface ◽  
Circular Cylinder ◽  
Vortex Shedding ◽  
Fluid Flows ◽  
Reynolds Numbers ◽  
Cfd Simulations ◽  
Induced Drag

CFD simulations of crossflows around a 2-D circular cylinder and the resulting vortex shedding from the cylinder are conducted in the present study. The capability of the CFD solver for vortex shedding simulation from a circular cylinder is validated in terms of the induced drag and lifting forces and associated Strouhal numbers computations. The validations are done for uniform horizontal fluid flows at various Reynolds numbers in the range 103 to 5×105. Crossflows around the circular cylinder beneath a free surface are also simulated in order to investigate the characteristics of the interaction between vortex shedding and a free surface at Reynolds number 5×105. The influence of the presence of the free surface on the vortex shedding due to the cylinder is discussed.

Control of instabilities in non-Newtonian free surface fluid flows

2013 ◽  
Vol 35 (3) ◽  
pp. 217-229 ◽  
Author(s):  
Geraldo de Freitas Maciel ◽  
Fabiana de Oliveira Ferreira ◽  
Guilherme Henrique Fiorot
Keyword(s):  
Free Surface ◽  
Fluid Flows

SPH–DCDEM model for arbitrary geometries in free surface solid–fluid flows

2016 ◽  
Vol 202 ◽  
pp. 131-140 ◽  
Author(s):  
Ricardo B. Canelas ◽  
Alejandro J.C. Crespo ◽  
Jose M. Domínguez ◽  
Rui M.L. Ferreira ◽  
Moncho Gómez-Gesteira
Keyword(s):  
Free Surface ◽  
Fluid Flows ◽  
Arbitrary Geometries

scholarly journals A 3D Simulation of a Moving Solid in Viscous Free-Surface Flows by Coupling SPH and DEM

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Liu-Chao Qiu ◽  
Yi Liu ◽  
Yu Han
Keyword(s):  
Free Surface ◽  
Three Dimensional ◽  
Fluid Flows ◽  
Free Surface Flows ◽  
Water Tank ◽  
Surface Flows ◽  
Computational Mesh ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Solid Phases

This work presents a three-dimensional two-way coupled method to simulate moving solids in viscous free-surface flows. The fluid flows are solved by weakly compressible smoothed particle hydrodynamics (SPH) and the displacement and rotation of the solids are calculated using the multisphere discrete element method (DEM) allowing for the contact mechanics theories to be used in arbitrarily shaped solids. The fluid and the solid phases are coupled through Newton’s third law of motion. The proposed method does not require a computational mesh, nor does it rely on empirical models to couple the fluid and solid phases. To verify the numerical model, the floating and sinking processes of a rectangular block in a water tank are simulated, and the numerical results are compared with experimental results reported in published literatures. The results indicate that the method presented in this paper is accurate and is capable of modelling fluid-solid interactions with a free-surface.

Free-Surface Ideal Fluid Flows by Finite Elements

1973 ◽  
Vol 99 (6) ◽  
pp. 959-974
Author(s):  
Stevens T. K. Chan ◽  
Bruce E. Larock ◽  
Leonard R. Herrmann
Keyword(s):  
Free Surface ◽  
Finite Elements ◽  
Ideal Fluid ◽  
Fluid Flows
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