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Wyszukujesz frazę "radiation heat flux" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Radiative Falkner-Skan flow of Walter-B fluid with prescribed surface heat flux
Autorzy:
Hayat, T.
Qayyum, S.
Imtiaz, M.
Alsaedi, A.
Powiązania:
https://bibliotekanauki.pl/articles/949144.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
Walter-B fluid
Falkner-Skan flow
prescribed surface heat flux
thermal radiation
Opis:
This article addresses the Falkner-Skan flow of an incompressible Walter-B fluid. Fluid flow is caused by a stretching wedge with thermal radiation and prescribed surface heat flux. Appropriate transformations are used to obtain the system of nonlinear ordinary differen- tial equations. Convergent series solutions are obtained by the homotopy analysis method. Influence of pertinent parameters on the velocity, temperature and Nusselt number are in- vestigated. It is observed that by increasing the viscoelastic parameter, the fluid velocity decreases. There is an enhancement of the heat transfer rate for the viscoelastic parameter and power law index. It is also found that the Prandtl number and radiation parameter decrease the heat transfer rate.
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 1; 117-127
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary assessment of a flat roof radiation on radiative heat gains of nearby windows - a case study
Autorzy:
Kaczmarzyk, Marcin
Musiał, Michał
Piątkowski, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/104948.pdf
Data publikacji:
2019
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
thermal radiation
flat roof
view-factor
diffused radiation
radiative heat flux
promieniowanie cieplne
promieniowanie rozproszone
dach płaski
Opis:
This paper presents the results of preliminary assessment of radiative heat flux received by selected windows from tar paper coated flat roof of the adjacent building. This study was conducted on an actual object: building “P” at the University of Technology in Rzeszow. Windows located on south-western elevation of “P” building are subjected to thermal and diffused solar radiation, coming from a flat roof of a nearby gym. It was suspected, that this extra heat flux may have significant influence on compartment overheating, that is observed by occupants of “P” building. For the purpose of this study, various atmospheric data, such as temperatures, solar irradiance and wind speed were collected on site. In order to gain more detailed insight into investigated problem, Finite Elements model of occurring phenomenon was developed. FE modelling along with calculations of necessary view factors were performed in Matlab 2019a. Our study demonstrated, that analysed windows receive twice the heat gains from the flat roof, that they would have received from grass covered ground surface in absence of the gym. It has been concluded, that the proximity of the flat roof with bituminous cover considerably influences radiative heat gains of the windows, especially these located at lower floors and the phenomenon seriously contributes to overheating of the compartments in studied building.
Źródło:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2019, 66, 2; 13-20
2300-5130
2300-8903
Pojawia się w:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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