By Sujoy Kumar Saha, Manvendra Tiwari, Bengt Sundén, Zan Wu
This short addresses the phenomena of warmth move enhancement. A significant other variation within the SpringerBrief Subseries on Thermal Engineering and utilized technological know-how to 3 different monographs together with “Critical warmth Flux in stream Boiling in Microchannels,” this quantity is idea for execs, researchers, and graduate scholars eager about digital cooling.
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4 51 Application of Nano-Fluids in Automobile Heat Exchangers as Coolant 160 T=50 °C T=45°C T=35°C 140 120 Nu 100 80 60 40 1 2 3 4 Vol. Flow Rate (Lit/min) 5 6 Fig. % 1. Addition of nanoparticles, irrespective of its concentration, results in increase in Nusselt number with increase in Reynolds number. 2. Concentration of nano-particle has an important bearing on the heat transfer efﬁciency. % of Al2O3 nano-particle into the pure water, an increase of about 30–45 % in comparison with the pure water heat transfer coefﬁcient has been recorded.
In: Proceedings of the 17th symposium on fusion technology, vol 1. pp 206–210 Cavallini A, Del Col D, Doretti L, Longo G, Rossetto L (1999) A new computational procedure for heat transfer and pressure drop during refrigerant condensation inside enhanced tubes. J Enhanc Heat Transfer 6(6):441–456 Celata GL (2004) Series in thermal and ﬂuid physics and engineering. Begell House, New York Celata GP, Cumo M, Mcphail S, Zummo G (2006) Characterization of ﬂuid dynamic behavior and channel wall effects in microtube.
1 Heat Transfer Performance Nusselt number, a dimensionless parameter, is used as an indicator of thermal performance. 18 depicts variation of Nusselt numbers with Reynolds numbers for the twisted elliptical tubes and smooth tube. It is observed that (1) for all the tubes, Nusselt number increases as the Reynolds number increases. (2) All the twisted elliptical tubes (TETs) performed better than the plain tube and the twisted tube number 1 performed the best among the ﬁve twisted tubes. (3) The effect of the twist pitch on the heat transfer performance of a twisted elliptical tube is more notable than that of the tube aspect ratio.
Advances in Heat Transfer Enhancement by Sujoy Kumar Saha, Manvendra Tiwari, Bengt Sundén, Zan Wu