Search results for " Finite Volume Method"

showing 4 items of 4 documents

The MAST-FV/FE scheme for the simulation of thermohaline processes in variable density saturated porous media

2009

A novel methodology for the simulation of 2D thermohaline double diffusive processes, driven by heterogeneous temperature and concentration fields in variable-density satu- rated porous media, is presented. The stream function is used to describe the flow field and it is defined in terms of mass flux. The partial differential equations governing system is given by the mass conservation equation of the fluid phase written in terms of the mass- based stream function, as well as by the advection–diffusion transport equations of the contaminant concentration and of the heat. The unknown variables are the stream func- tion, the contaminant concentration and the temperature. The governing equatio…

Density driven flowFinite element methodStream functionFinite volume methodPorous mediaThermohaline processDensity driven flows thermohaline process finite volume method finite element method porous media stream functionSettore ICAR/01 - Idraulica
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The MAST-FV/FEM scheme for the simulation of thermohaline processes in density-variable saturated porous media

2008

Density driven flows thermohaline process finite volume method finite element method porous media stream function
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A study of turbulent heat transfer in curved pipes by numerical simulation

2013

Abstract Turbulent heat transfer in curved pipes was studied by numerical simulation. Two curvatures δ (pipe radius a/curvature radius c) were considered, 0.1 and 0.3; results were also obtained for a straight pipe (δ = 0) for comparison purposes. A tract of pipe 5 diameters in length was chosen as the computational domain and was discretized by finite volume multiblock-structured grids of ∼5.3 × 106 hexahedral cells. Fully developed conditions were assumed; the friction velocity Reynolds number was 500, corresponding to bulk Reynolds numbers between 12 630 and ∼17 350 according to the curvature, while the Prandtl number was 0.86 (representative of saturated liquid water at 58 bar). Simulat…

Fluid Flow and Transfer ProcessesPhysicsTurbulenceMechanical EngineeringPrandtl numberDirect numerical simulationReynolds numberMechanicsHeat transfer coefficientCondensed Matter PhysicsCurvaturePhysics::Fluid Dynamicssymbols.namesakeClassical mechanicsTurbulent heat transfer curved pipe Direct Numerical Simulation Computational Fluid Dynamics Finite Volume MethodHeat transfersymbolsShear velocitySettore ING-IND/19 - Impianti Nucleari
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A mesh less approch based upon Radial basis function Hermite collocation method for predicting the cooling and the freezing times of foods

2005

This work presents a meshless numerical scheme for the solution of time dependent non linear heat transfer problems in terms of a radial basis function Hermite collocation approach. The proposed scheme is applied to foodstuff's samples during freezing process; evaluation of the time evolution of the temperature profile along the sample, as well as at the core, is carried out. The moving phase-change zone is identified in the domain and plotted at several timesteps. The robustness of the proposed scheme is tested by a comparison of the obtained numerical results with those found using a Finite Volume Method and with experimental results.

Settore ING-IND/10 - Fisica Tecnica IndustrialeFoodstuff Hermite collocation Numerical scheme Time evolutionCooling Finite volume method Food processing Freezing Heat transfer Numerical analysis Robustness (control systems)Radial basis function networks
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