Journal of Thermodynamics / 2012 / Article / Tab 1

Research Article

CFD Analysis for Heat Transfer Enhancement inside a Circular Tube with Half-Length Upstream and Half-Length Downstream Twisted Tape

Table 1

The highest recorded heat transfer enhancement level estimated due to each enhancer, (Siddique et al. [3]).

Heat transfer enhancer type(Heat transfer due presence of the enhancer/heat transfer in absence of the enhancer)

Fins inside tubes 2.0, [4]
Microfins inside tubes4.0 for laminar, [5]
Porous media 12.0 (keff/kf), [6]
Nanofluids 3.5, [7]
Flexible seals2.0, [8]
Flexible complex seals 3.0, [9]
Vortex generators 2.5, [10]
Protrusions 2.0, [11, 12]
Ultra high thermal conductivity composite materials 6, [13]

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