Equations Of Heat
Mostrando 1-12 de 191 artigos, teses e dissertações.
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1. Comparative analysis of butter thermal behavior in combination with bovine tallow
Abstract Assessment of butter authenticity in combination with animal fat is a major challenge. Changing the butter composition can affect crystallization and polymorphism properties. The purpose of this study was to evaluate the thermal behavior of butter combined with (0-15% w/w) bovine tallow using Digital Calorimetric Scanning, and to determine fatty aci
Food Sci. Technol. Publicado em: 2020-12
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2. Effect of Plasma Arc Welding on Residual Stress and Distortion of Thin Titanium Sheet
In this research work, a finite element model is developed to predict the temperature field and residual stress during plasma arc welding of thin Ti-6Al-4V sheets. Dhinakaran’s heat source model which is based on Parabolic Gaussian distribution is used to predict the temperature field and Anand’s model is used to predict the residual stress. Numerical si
Mat. Res.. Publicado em: 20/01/2020
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3. Exact and inexact differentials in the early development of mechanics and thermodynamics
Abstract We give an account and a critical analysis of the use of exact and inexact differentials in the early development of mechanics and thermodynamics, and the emergence of differential calculus and how it was applied to solve some mechanical problems, such as those related to the cycloidal pendulum. The Lagrange equations of motions are presented in the
Rev. Bras. Ensino Fís.. Publicado em: 02/12/2019
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4. Photovoltaic Cell Temperature Estimation for a Grid-Connect Photovoltaic Systems in Curitiba
Abstract The photovoltaic solar energy has been growing in installed capacity worldwide year by year, and Brazil has also been investing in this renewable source of energy generation. The conversion of light into electrical energy occurs in the photovoltaic cells, which are sensitive to the increase of the temperature. A considerable amount of the energy in
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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5. ENERGETIC ANALYSIS OF AN ABSORPTION CHILLER USING NH3/LiNO3 AS AN ALTERNATIVE WORKING FLUID
Abstract This paper presents a thermodynamic model developed for a prototype absorption chiller using NH3/LiNO3 with 10 kW of nominal capacity. The study was undertaken using thermodynamic modeling based on the mass and energy balance, takes the overall heat transfer coefficients into consideration and uses the characteristic equation method. First, the resu
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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6. Evaluation of the Acid Baking Technique to Decrease the Phosphorus Content of the Iron Ore
Unlike the available mineral resources, the steelmaking processes have demanded raw material with lower phosphorus content to decrease the costs, energy use, and the residue generated within the steel plant. One alternative is to develop pretreatment of the iron ore concentrates producing raw materials with lower phosphorus. Depending on the mineral structur
Mat. Res.. Publicado em: 23/09/2019
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7. Estudo do envelhecimento e do tratamento térmico de rejuvenescimento da superliga GTD111
RESUMO A superliga de níquel GTD111 é comumente utilizada na fabricação de pás de turbinas a gás, destinadas a geração de energia e aplicações aeronáuticas. O presente estudo investiga o comportamento desta superliga “como fornecida” pelo fabricante e previamente tratada termicamente à fim de diminuir o tamanho de γ’ e transformá-lo de mo
Matéria (Rio J.). Publicado em: 16/09/2019
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8. Modelagem e simulação do crescimento de Talaromyces flavus em abacaxi: uma integração entre modelos cinéticos e de fenômenos de transporte
Resumo O estudo da dinâmica de crescimento de microrganismos em alimentos é de vital importância para a extensão da vida de prateleira desses produtos. No presente trabalho, um modelo de cinética microbiológica descrevendo o crescimento de Talaromyces flavus em abacaxi foi integrado com um modelo térmico. O modelo integrado foi utilizado para simular
Braz. J. Food Technol.. Publicado em: 22/08/2019
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9. Investigation of Thermal Parameters Effects on the Microstructure, Microhardness and Microsegregation of Cu-Sn alloy Directionally Solidified under Transient Heat Flow Conditions
The microstructure and mechanical properties of cast materials are strongly dependent on the thermal history during solidification process. The global casting industry has faced major challenges, i.e., customers increasingly demand completely finished cast parts as well as complexity of casting alloys are rising. Therefore, the previous knowledge the solidif
Mat. Res.. Publicado em: 19/08/2019
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10. EFFECT OF STEEL PLATE THICKNESSES AND FLUID FLOW CHARACTERISTICS OF AN IMPINGING AIR JET ON HEAT TRANSFER AT THE STAGNATION POINT
ABSTRACT The design and process of heat transfer elements, from its source to heat sink through various media vary according to the product and system concerned. The effect of thickness of a steel plate on heat transfer characteristics with an impinging air jet at the stagnation point was studied. Experiments were carried out with different nozzles, heights,
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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11. Escoamento de Calor Representado pela Equação de Laplace e a Transformada de Fourier em Seno e Cosseno
RESUMO Nesse artigo a equação de Laplace foi utilizada para representar uma distribuição de temperaturas estacionárias no primeiro quadrante no plano cartesiano com diferentes condições de fronteira, tendo sido examinada com detalhes, a luz da transformada de Fourier em seno e cosseno. Após obter a solução formal para cada exemplo, foi possível, u
TEMA (São Carlos). Publicado em: 10/06/2019
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12. What is the best temperature-humidity index equation to indicate heat stress in crossbred dairy calves in a tropical environment?
RESUMO: Objetivou-se determinar dentre nove equações do ITU a que melhor representa os efeitos do estresse por calor para bezerros leiteiros mestiços criados em ambiente tropical. Foram avaliados 12 bezerros, machos e fêmeas, com idade de 20 a 60 dias, criados no bezerreiro tropical. As frequências respiratória (FR) e cardíaca (FC), as temperaturas re
Cienc. Rural. Publicado em: 11/02/2019