scholarly journals CFD STUDIO: AN EDUCATIONAL SOFTWARE FOR CFD ANALYSIS

2003 ◽  
Vol 2 (2) ◽  
Author(s):  
R. A. Pieritz ◽  
R. Mendes ◽  
R. Ferraz ◽  
C. R. Maliska
Keyword(s):  
Heat Transfer ◽  
Finite Volume ◽  
Educational Software ◽  
Transfer Problem ◽  
Heat Transfer Process ◽  
Coupled Heat Transfer ◽  
Fully Implicit ◽  
Finite Volume Approach ◽  
General Aspects ◽  
User Friendly

The main goal of this paper is to demonstrate the general characteristics of the educational user-friendly CFD Studio package for CFD teaching. The package was designed for teaching 2D fluid mechanics and heat transfer process, including conduction, coupled conduction/convection, natural and forced convection, external and internal flows, among other phenomena. The finite volume methodology and its related topics can also be taught using the software. Therefore, general aspects of the three main modules, pre-processor, solver and post-processor are discussed aiming to show the generality of the tool. These modules are integrated in the application by a so-called “numerical problem project” which guide the student through the steps to obtain the solution. To approximate the partial differential equations the finite volume approach is employed using a fully-implicit formulation with the interpolation schemes CDS, UDS and WUDS. Mesh editing and nonorthogonal boundary-fitted mesh generation, using algebraic interpolation and elliptic equations, are important features of the package. Coupled heat transfer problems are handled using the “solid-block” formulation and the pressure-velocity coupling uses the SIMPLE and SIMPLEC methods with non-staggered grids. To demonstrate the capabilities two fluid flow and heat transfer “problem projects” are presented.

scholarly journals CFD STUDIO: AN EDUCATIONAL SOFTWARE FOR CFD ANALYSIS

2003 ◽  
Vol 2 (2) ◽  
pp. 09
Author(s):  
R. A. Pieritz ◽  
R. Mendes ◽  
R. Ferraz ◽  
C. R. Maliska
Keyword(s):  
Heat Transfer ◽  
Finite Volume ◽  
Educational Software ◽  
Transfer Problem ◽  
Heat Transfer Process ◽  
Coupled Heat Transfer ◽  
Fully Implicit ◽  
Finite Volume Approach ◽  
General Aspects ◽  
User Friendly

The main goal of this paper is to demonstrate the general characteristics of the educational user-friendly CFD Studio package for CFD teaching. The package was designed for teaching 2D fluid mechanics and heat transfer process, including conduction, coupled conduction/convection, natural and forced convection, external and internal flows, among other phenomena. The finite volume methodology and its related topics can also be taught using the software. Therefore, general aspects of the three main modules, pre-processor, solver and post-processor are discussed aiming to show the generality of the tool. These modules are integrated in the application by a so-called “numerical problem project” which guide the student through the steps to obtain the solution. To approximate the partial differential equations the finite volume approach is employed using a fully-implicit formulation with the interpolation schemes CDS, UDS and WUDS. Mesh editing and nonorthogonal boundary-fitted mesh generation, using algebraic interpolation and elliptic equations, are important features of the package. Coupled heat transfer problems are handled using the “solid-block” formulation and the pressure-velocity coupling uses the SIMPLE and SIMPLEC methods with non-staggered grids. To demonstrate the capabilities two fluid flow and heat transfer “problem projects” are presented.

Electron–Phonon Coupled Heat Transfer and Thermal Response Induced by Femtosecond Laser Heating of Gold

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
Pengfei Ji ◽  
Yuwen Zhang
Keyword(s):  
Heat Transfer ◽  
Femtosecond Laser ◽  
Density Functional ◽  
Energy Transport ◽  
Thermal Response ◽  
Coupling Factor ◽  
Heat Transfer Process ◽  
Thermal Excitation ◽  
Coupled Heat Transfer ◽  
Electron Heat Capacity

Ab initio simulation is one of the most effective theoretical tools to study the electrons evolved heat transfer process. Here, we report the use of finite-temperature density functional theory (DFT) to investigate the electron thermal excitation, electron–phonon coupled heat transfer, and the corresponding thermal response induced by energy deposition of femtosecond laser pulse in gold. The calculated results for cases with different scales of electron excitations demonstrate significant electron temperature dependence of electron heat capacity and electron–phonon coupling factor. Bond hardening of laser-irradiated gold and structural variation from solid to liquid are observed. The obtained results shed light upon the ultrafast microscopic processes of thermal energy transport from electron subsystem to lattice subsystem and serve for an improved interpretation of femtosecond laser–metal interaction.

Modelling and Simulation of Resin Transfer Moulding: A Finite Volume Approach Applied to the Mold Filling Stage

2014 ◽  
Vol 353 ◽  
pp. 67-72 ◽  
Author(s):  
B.G. Coutinho ◽  
V.M. França Bezerra ◽  
Severino Rodrigues de Farias Neto ◽  
Antônio Gilson Barbosa de Lima
Keyword(s):  
Finite Volume ◽  
Mold Filling ◽  
Two Phase ◽  
Filling Stage ◽  
Fully Implicit ◽  
Rtm Process ◽  
Front Position ◽  
Filling Time ◽  
Finite Volume Approach ◽  
Volume Method

RTM process is widely used for the production of high quality fiber reinforced composites parts. Computer simulations can play an important role in optimization of RTM processes by reducing risks and costs. In this paper, we present a two dimensional mathematical modelling for the mold filling stage in RTM process. It was used a two phase model (air-resin) which neglects the capillary and gravitational effects and considers all phases incompressible. The set of partial differential equations, expressed in boundary-fitted coordinates, are discretized by using the finite volume method and solved using a fully implicit methodology and the Newton's method. To validate the methodology, numerical and experimental data of the filling time and flow front position along the process are compared and good agreement was obtained.

An Educational Software Package for CFD Simulation and Visualization

2007 ◽  
Author(s):  
H. F. Manesh ◽  
M. Hashemipour
Keyword(s):  
Heat Transfer ◽  
High Performance ◽  
Educational Software ◽  
Cfd Simulation ◽  
Flat Surface ◽  
Object Oriented ◽  
Complex Problem ◽  
Object Oriented Approach ◽  
User Friendly ◽  
Performance Computing

The development of the Virtual Reality (VR) techniques for visualizaton of the computational simulations of complex problem has opened some new avenues for heat transfer and fluid flow research. The importance of data visualization is clearly recognized for to better understanding of the 3-D nature of the flow fields. This work introduces the educational user friendly “VRJET” package designed for teaching fluid mechanics and heat transfer. A Software is developed with C++ standard Programming language using an object-oriented approach to visualize the flow field with high performance computing including advanced support for data presentation and navigation techniques through 3D virtual environment. This work deals with 3-D visualization of the data of impinging laminar single square jet on a heated flat surface, obtained from numerical simulation. This package can be used for research, educational, and engineering.

Computations of Turbulent Flow and Heat Transfer in Staggered Tube Banks

1996 ◽  
Author(s):  
M. C. Sharatchandra ◽  
David L. Rhode
Keyword(s):  
Heat Transfer ◽  
Turbulent Flow ◽  
Finite Volume ◽  
Cross Flow ◽  
Turbulence Models ◽  
Curvilinear Coordinates ◽  
Flow And Heat Transfer ◽  
Finite Volume Approach ◽  
Tube Banks ◽  
Limiting Case

Abstract Turbulent Flow in closely spaced staggered tube bundles is numerically investigated using a finite-volume approach in general curvilinear coordinates. Attention if focused on the hydrodynamic and thermal effects of the longitudinal displacement of alternate tube rows. The computations used both standard and 2-layer k–ϵ turbulence models in conjunction with a streamwise periodic finite volume formulation. The computations are in excellent agreement with experimental data for the limiting case of flow and heat transfer in undisplaced tube banks. Furthermore, the results indicate increases in both pressure drop and heat transfer with an increase in displacement. The results of this study may serve as an aid in the design of shell and tube cross flow heat exchangers.

scholarly journals Numerical simulation of coupeld heat transfer through a concrete hollow brick

2019 ◽  
Vol 286 ◽  
pp. 08004
Author(s):  
B. Jamal ◽  
M. Boukendil ◽  
A. Abdelbaki ◽  
Z. Zrikem
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Fluid Flow ◽  
Natural Convection ◽  
Rayleigh Number ◽  
Simple Algorithm ◽  
Governing Equations ◽  
Coupled Heat Transfer ◽  
Hollow Brick ◽  
Finite Volume Approach

The present study aims to investigate coupled heat transfer by natural convection and conduction through a concrete hollow brick. The governing equations for conservation of mass, momentum and energy are discretized by the finite volume approach and solved by the SIMPLE algorithm. The numerical simulations were conducted to investigate the effect of Rayleigh number (103≤ Ra ≤ 107) on the heat transfer and fluid flow within the structure.

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