Convection Equation
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. The impact of convective drying on the color, phenolic content and antioxidant capacity of noni (Morinda citrifolia L.)
Abstract The effect of thin-layer drying temperature on color, phenolic content and antioxidant capacity of noni slices was investigated. Noni slices were air-dried at 50, 60 and 70 °C under natural convection conditions. Drying curves were fitted to thin-layer drying models in order to evaluate the drying characteristics of the product. In addition, an uns
Food Sci. Technol. Publicado em: 08/12/2016
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2. Integral transform solution of natural convection in a square cavity with volumetric heat generation
The generalized integral transform technique (GITT) is employed to obtain a hybrid numerical-analytical solution of natural convection in a cavity with volumetric heat generation. The hybrid nature of this approach allows for the establishment of benchmark results in the solution of non-linear partial differential equation systems, including the coupled set
Braz. J. Chem. Eng.. Publicado em: 2013-12
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3. An inverse model for locating skin tumours in 3D using the genetic algorithm with the Dual Reciprocity Boundary Element Method
Here, the Dual Reciprocity Boundary Element Method is used to solve the 3D Pennes Bioheat Equation, which together with a Genetic Algorithm, produces an inverse model capable of obtaining the location and the size of a tumour, having as data input the temperature distribution measured on the skin surface. Given that the objective function, which is solved in
Lat. Am. j. solids struct.. Publicado em: 2013-11
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4. Human thermal comfort: an irreversibility-based approach emulating empirical clothed-body correlations and the conceptual energy balance equation
Exergetic analysis can provide useful information as it enables the identification of irreversible phenomena bringing about entropy generation and, therefore, exergy losses (also referred to as irreversibilities). As far as human thermal comfort is concerned, irreversibilities can be evaluated based on parameters related to both the occupant and his surround
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-12
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5. Estudo numérico da aplicação do método dos elementos finitos de Galerkin e dos mínimos quadrados na solução da equação da convecção-difusão-reação tridimensional / Numerical study of the application of Galerkin and least squares finite element methods in the solution of the tridimentional convection-diffusion-reaction equation
This paper the application of the Finite Element Method in variants Galerkin and Least Squares with auxiliary equations for the numerical solution of partial differential equation that models the convection-diffusion-reaction defined over a three-dimensional domain in steady state. In the spatial discretization were used hexahedrons elements with eight (line
Publicado em: 2011
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6. Order of accuracy study of unstructured grid finite volume upwind schemes
A detailed numerical study is presented of the order of accuracy of some proposed cell centered, finite volume schemes used for the solution of the 2-D gasdynamic equations on triangular unstructured grids. The schemes studied are based on a MUSCL-type linear reconstruction of interface properties, which seeks to achieve 2nd-order accuracy in space. They are
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-03
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7. SIMULAÇÃO DA ETAPA DE RESFRIAMENTO DA POLIAMIDA NO PROCESSO DE MOLDAGEM ROTACIONAL / COOLING STAGE SIMULATION OF POLYAMIDE IN ROTATIONAL MOLDING PROCESS
In rotomolding, cooling stage is of fundamental importance to optimize the process in terms of productivity and quality of rotomolded parts. Therefore, the present work has concentrated in the study of this process stage through computational simulation via the multi-purpose commercial software ANSYSTM . It uses finite element method being widely used in eng
Publicado em: 2007
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8. Simulação do escoamento miscível decorrente da injeção de ácido em um meio poroso com dissolução parcial do meio / Flow simulation of the acid injection in porous media with partial dissolution of the porous media
Formulamos um modelo simplificado para o estudo do processo de injeção de solvente em reservatórios de petróleo, onde o fluido injetado (um ácido) tem a capacidade de dissolver parcialmente a matriz sólida. Como hipóteses principais, consideramos que o solvente e o soluto (componente químico que constitui o meio poroso) são espécies totalmente misc
Publicado em: 2007
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9. Numerical simulation of the water movement and solutes in soil unsaturated / Simulação numérica do movimento de água e solutos em solos não saturados
The interest in studying problems of underground drainage and solutos transport not in soils saturated it has been increasing significantly in the last years, mainly because of the growing concern with the quality of the soil and of the environment in general. Applied fertilizers in agricultural lands move below the zone radicular of the plants and they can
Publicado em: 2007
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10. Desenvolvimento e implementação do método difusional bidimensional transiente para solução numérica de problemas convectivos difusivos
The study of groundwater contamination involves understanding the relevant mechanisms involved in the migration of pollutants (transport problems). Such problems are governed by convection-diffusion equations whose numerical solutions can be obtained through discrete techniques, when the problem is dominated by diffusion. However, when such problems are domi
Publicado em: 2006
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11. Análise de um método para equação de convecção formulado à luz da mecânica dos meios contínuos a advecção de anomalias oceânicas e meteorológicas / Analysis of a method for the convection equation formulated in the light of mechanical means of the continuous advection of oceanic and meteorological anomalies
In the present work we studied and analyzed the Trajectories Tube method, a conservative, explicit, simple, physically intuitive, semi-Lagrangian algorithm for the convection equation. Kinematical aspects of the mechanics of continuous media are essentially the tools used for formulation and feasibility analysis. We showed that this method is unconditionally
Publicado em: 2006
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12. Analysis of thermal non-equilibrium for turbulent transport in porous media.
The literature has documented proposals for macroscopic energy equation modeling for porous media considering the local thermal equilibrium hypothesis and laminar flow. In addition, a two-energy equation model has been proposed for conduction and laminar convection in packed beds. With the aim of contributing to new developments, this work treats turbulent h
Publicado em: 2006