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dc.contributor.authorGschwendtner, MA
dc.date.accessioned2012-12-18T01:26:30Z
dc.date.available2012-12-18T01:26:30Z
dc.date.copyright2004
dc.date.issued2012-12-18
dc.identifier.citationHeat and Mass Transfer/Waerme- und Stoffuebertragung, vol.40(6-7), pp.551 - 559
dc.identifier.issn0947-7411
dc.identifier.urihttp://hdl.handle.net/10292/4936
dc.description.abstractThe Eckert number phenomenon was investigated theoretically by Geropp in 1969 and describes a reversal in heat transfer from a moving wall at an Eckert number Ec ≈ 1. In this report the Eckert number phenomenon is confirmed experimentally for the first time. For that purpose the heat transfer from a heated, vertically rotating cylinder in a crossflow was investigated. In order to perform the experiments in a range where the predicted phenomenon occurs, extreme rotational speeds were necessary. A heating concept had to be developed which allowed an input of heating power independent of the speed and which therefore had to be contact-free. The results show, among other things, that the temperature difference between the wall and the surrounding fluid has a significant effect on the predicted reversal of heat transfer at the wall. Moreover, maximum heat transfer occurs at an Eckert number Ec ≈ 0.3, which is of great importance for the cooling of hot surfaces in a gas-flow.
dc.publisherSpringer-Verlag
dc.rightsAn author may self-archive an author-created version of his/her article on his/her own website and or in his/her institutional repository. He/she may also deposit this version on his/her funder’s or funder’s designated repository at the funder’s request or as a result of a legal obligation, provided it is not made publicly available until 12 months after official publication. He/ she may not use the publisher's PDF version, which is posted on www.springerlink.com, for the purpose of self-archiving or deposit. Furthermore, the author may only post his/her version provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's website. The link must be accompanied by the following text: "The final publication is available at www.springerlink.com”. (Please also see Publisher’s Version and Citation)
dc.subjectEckert number
dc.subjectNusselt number
dc.subjectHeat transfer
dc.subjectRotating cylinder
dc.subjectAdiabatic wall temperature
dc.subjectBoundary layer
dc.subjectDissipation
dc.subjectFrictional heat
dc.titleThe Eckert number phenomenon: experimental investigations on the heat transfer from a moving wall in the case of a rotating cylinder
dc.typeJournal Article
dc.rights.accessrightsOpenAccess
dc.identifier.doi10.1007/s00231-003-0437-9
aut.relation.endpage559
aut.relation.issue6-7
aut.relation.startpage551
aut.relation.volume40
pubs.elements-id123310


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