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Wilfried Roetzel
Researcher at Helmut Schmidt University
Publications - 101
Citations - 8205
Wilfried Roetzel is an academic researcher from Helmut Schmidt University. The author has contributed to research in topics: Heat exchanger & Heat transfer coefficient. The author has an hindex of 24, co-authored 101 publications receiving 7440 citations. Previous affiliations of Wilfried Roetzel include Council for Scientific and Industrial Research.
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Conceptions for heat transfer correlation of nanofluids
Yimin Xuan,Wilfried Roetzel +1 more
TL;DR: In this article, the authors proposed two different approaches for deriving heat transfer correlation of the nanofluid, and investigated the mechanism of heat transfer enhancement of the nano-fluid.
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Temperature dependence of thermal conductivity enhancement for nanofluids
TL;DR: In this article, the authors investigated the increase of thermal conductivity with temperature for nano fluids with water as base fluid and particles of Al 2 O 3 or CuO as suspension material.
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Pool boiling characteristics of nano-fluids
TL;DR: In this paper, the authors investigated the role of transient conduction in pool boiling and concluded that the change of surface characteristics during boiling due to trapped particles on the surface is the cause for the shift of the boiling characteristics in the negative direction.
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Natural convection of nano-fluids
TL;DR: In this article, an apparently paradoxical behaviour of heat transfer deterioration was observed in nano-fluid and its dependence on parameters such as particle concentration, material of the particles and geometry of the containing cavity have been investigated.
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Pool boiling of nano-fluids on horizontal narrow tubes
TL;DR: In this article, an experimental study of pool boiling in water-Al2O3 nano-fluids on horizontal tubes of small diameter is carried out and it is found that at the range of narrow tubes the deterioration in performance in boiling is less compared to large industrial tubes which makes it less susceptible to local overheating in convective applications.