Number of the records: 1

An experimental investigation of unsteady thermal processes on a pre-cooled circular cylinder of porous material in the wind

SYSNO ASEP	0429256
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	An experimental investigation of unsteady thermal processes on a pre-cooled circular cylinder of porous material in the wind
Author(s)	Král, Radomil (UTAM-F)_{RID, SAI}
Number of authors	1
Source Title	International Journal of Heat and Mass Transfer. - : Elsevier - ISSN 0017-9310 Roč. 77, October (2014), s. 906-914
Number of pages	9 s.
Publication form	Print - P
Language	eng - English
Country	GB - United Kingdom
Keywords	circular cylinder ; unsteady heat transfer ; temperature distribution ; wind tunnel experiment ; porous material
Subject RIV	JN - Civil Engineering
R&D Projects	ED1.1.00/02.0060 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	GBP105/12/G059 GA ČR - Czech Science Foundation (CSF)
Institutional support	UTAM-F - RVO:68378297
UT WOS	000340302400082
EID SCOPUS	84903851795
DOI	10.1016/j.ijheatmasstransfer.2014.06.045
Annotation	This paper presents a simple and reliable method for determining the phenomenon of unsteady thermal transfer mainly for elements of porous materials. The method is demonstrated on a concrete circular cylinder subjected to air cross-flow at a constant temperature. Based on the technique of specific volume heat capacity of the system, thermal processes for various Reynolds numbers up to Re = 111,000 are monitored and measured using embedded thermal probes and multi-point surface thermometry. By identifying the fitting approximation functions over the measurement points, the time evolutions of the temperature distribution over the cross-section are estimated, which form the basis for determining the total heat energy transferred from the free-stream to the cylinder. The overall heat transfer coefficient is evaluated at various temporal stages of the testing. The paper also shows transient conductive processes in the cylinder arising due to the forced heat transfer at various flow velocities.
Workplace	Institute of Theoretical and Applied Mechanics
Contact	Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285
Year of Publishing	2015
Electronic address	http://www.sciencedirect.com/science/article/pii/S0017931014005171

Number of the records: 1