scholarly journals Computational simulation of heat conduction on different surfaces

2021 ◽  
Vol 342 ◽  
pp. 01014
Author(s):  
Gheorghe Daniel Florea ◽  
Nicolae Ioan Vlasin ◽  
Adrian Bogdan Şimon-Marinică ◽  
Florin Manea ◽  
Zoltan Vass
Keyword(s):  
Heat Transfer ◽  
Heat Conduction ◽  
Direct Contact ◽  
Physical Phenomenon ◽  
Computational Simulation ◽  
Theoretical Knowledge ◽  
Physical Processes ◽  
Radiation Study ◽  
Computerized Simulation

The heat conduction from the initiation source to the adjacent surfaces, is a physical phenomenon worth considering in the process of analysing the fire. This complex phenomenon describes how the transport, the exchange, and the redistribution of the thermal energy are carried out. It is based on the theoretical knowledge that describes the initiation and fire evolution in time. The flames transfer heat from nearby surfaces through two distinct physical processes, namely convection and radiation. Another way of heat transfer is conduction, in which case the transfer of heat implies the existence of an environment that can be of a gaseous, liquid or solid nature. This paper illustrates a brief presentation of how the heat transfer is carried out, the influence of the three phenomena on the mechanism of initiation and development of the fire, and can be seen as well as a case study aimed at the computerized simulation of a fire, having as a source of initiation the radiative transfer of heat to the surrounding combustible surfaces. The ignition of the different materials in a room, due to radiation exposure emitted by an incandescent source at a certain distance from them, even without having a direct contact to the flames, is a common reality in the case of fires that occur in both residential and industrial environments. This fact justifies the importance of thermal radiation study.

scholarly journals Comparison of analytical methods and numerical methods in modeling the physical phenomenon of heat conduction with free radiation

2021 ◽  
Vol 2102 (1) ◽  
pp. 012015
Author(s):  
C Nolasco Serna ◽  
N Afanador Garcia ◽  
G Guerrero Gómez
Keyword(s):  
Heat Transfer ◽  
Heat Conduction ◽  
Fluid Mechanics ◽  
Numerical Method ◽  
Materials Science ◽  
Physical Phenomenon ◽  
Heat Transfer Process ◽  
Percentage Error ◽  
Temperature Function ◽  
Physical Phenomena

Abstract The development of mathematical setting for modeling heat conduction phenomena in the presence of radioactive effects is well known. The importance in the study of heat conduction in relation to radioactive effects is relevant in several engineering applications such as combustion, materials science, fluid mechanics and other areas. This research is based on the mathematical model of the heat equation to study the physical phenomenon of heat transfer along a metal bar with slightly insulated sides with the effect of free radiation. To calculate the temperature function that allows modeling the heat transfer process along the bar, the Fourier series solution is constructed step by step, in addition an alternative method of calculating the temperature by using the explicit numerical method is given. The calculation of the temperature along the bar is compared by analytical and numerical method by computing the percentage error and different temperature profiles are plotted to verify the fit of the two approaches. The methods developed throughout the research can be extended to other types of physical phenomena that are useful in related research and in education in engineering subjects such as fluid mechanics and heat transfer.

3D Unsteady Heat Transfer in Multi-Connected Domains via LSFEM: A Case Study

2015 ◽  
Vol 775 ◽  
pp. 93-97
Author(s):  
Estaner Claro Romão
Keyword(s):  
Heat Transfer ◽  
Finite Element Method ◽  
Exact Solution ◽  
Finite Element ◽  
Heat Conduction ◽  
Least Squares ◽  
Unsteady Heat Transfer ◽  
Future Studies ◽  
Comparison Of The Results

This paper aims in particular to do a case study of the numerical efficiency of the application of LSFEM (Least Squares Finite Element Method) in the solution of heat conduction problems in multi-connected domains. To demonstrate this study two cases (the first with exact solution for comparison of results) are presented in the same multi-connected geometry, of easy construction, to facilitate the comparison of the results of this paper with future studies of other researchers.

scholarly journals Fieldwork in Ground Zero, Mallorca. A Methodological Fieldwork Proposal for a Geographical Analysis of Tourist Areas

2020 ◽  
Author(s):  
Macià Blázquez-Salom ◽  
Asunción Blanco-Romero
Keyword(s):  
Direct Contact ◽  
Direct Analysis ◽  
Theoretical Knowledge ◽  
Tourist Industry ◽  
Research Experience ◽  
Ground Zero ◽  
Tourism Geography ◽  
Indispensable Tool ◽  
Made In

For scientific headway to be made in the field of social science today, direct contact with analysed phenomena is all-important. The research hypothesis we put forward is that, just like practical laboratory work, fieldwork is an indispensable tool in tourism geography in guaranteeing rigorous scientific studies. The aim of this paper is: 1) to help demonstrate the usefulness of fieldwork in tourism geography in enriching the taught theory and concepts; 2) to design useful methodological tools for planning student-driven, enquiry-based learning processes; 3) to use Mallorca as a case study in a direct analysis of the complex spatial consequences of the Anthropocene on the tourist industry. Our teaching and research experience in tourism geography, particularly in relation to global change during the Anthropocene, are fundamental in achieving these objectives. We conclude that fieldwork helps students to develop important skills and competences, facilitating meaningful learning. Through the students’ active participation, the teacher is no longer a transmitter of theoretical knowledge, but a facilitator in the learning process.

scholarly journals Applications of differential equations to model the physical phenomenon of heat transfer with an internal energy source

2021 ◽  
Vol 2102 (1) ◽  
pp. 012018
Author(s):  
J J Cadena-Morales ◽  
C A López-Castro ◽  
J M Alba-Maldonado
Keyword(s):  
Energy Source ◽  
Mathematical Model ◽  
Heat Conduction ◽  
Internal Energy ◽  
Chemical Reactions ◽  
Physical Phenomenon ◽  
Computational Simulation ◽  
Heat Diffusion ◽  
Large Cities ◽  
Physical Phenomena

Abstract The mathematical modeling of the physical phenomenon of conduction in the presence of heat sources has various uses in engineering ranging from heat diffusion, pollution generation in large cities and chemical reactions. From the mathematical theory, the study of physical phenomena with the presence of heat is approached from techniques of polynomial approximation, analysis of variations and numerical methods. In this research a mathematical model is proposed to study the heat conduction in a metal bar with a heat source. In the first part of the work, by the application of the method of the parameter variation, the exact solution of the mathematical model is calculated. Subsequently, by means of a case study of the physical phenomenon of heat conduction with internal energy source, with the use of computational simulation, the convergence of the Fourier series linked to the physical phenomenon is shown. The mathematical method proposed in the paper can be applied to other physical phenomena such as wave propagation, electric potential, and chemical reactions.

Potential impacts of slum urbanisation on channel bank storage in the Bang Pakong River, Thailand

2012 ◽  
Vol 7 (4) ◽  
Author(s):  
K. Harriden
Keyword(s):  
Water Quality ◽  
Balance Equations ◽  
Physical Processes ◽  
Social Phenomena ◽  
Urban Settlements ◽  
Recharge Rates ◽  
Water Quality Deterioration ◽  
Informal Urban Settlements ◽  
Storage Processes

Generally regarded as social phenomena, this paper regards slum urbanisation as an environmental actor. Specifically, how slum developments modify hydrogeomorphological processes motivates this research. Using the Bang Pakong River, eastern Thailand, as a case study, a literature review was conducted. The literature reviewed indicated changes in physical processes such as channel bank stability, water quality, flow regimes and the hydrological balance equations can occur with slum development. Given the importance of channel banks as the physical basis of many slum sites, this paper focuses on the possible changes to channel bank storage in the Bang Pakong River following slum urbanisation. The research highlights possible changes to channel bank storage processes, notably decreased storage recharge rates; increased anthropogenic extraction; and probable water quality deterioration. Deeper scientific understanding of how river processes are affected by specific forms of urban development can contribute to better management of both informal urban settlements and rivers.

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