K.Thirumalai kannan, et al  studied the numerical study of heat transfer and fluid flow analysis in plate-fin and tube M. mirzaei el al.  numerically studied the augmentation heat exchangers with different shaped vortex generators of heat transfer by using vortex generator on flat/round tube mounted behind the tubes.
(PDF) Performance Enhancement of Shell and Tube Heat Flow resistance and heat transfer of several shell-and-tube heat exchangers with discontinuous helical baffles are experimentally studied and compared at the five helix angles of 8°, 12°, 20
Dec 06, 2006 · This work is aimed at assessing the potential of winglet-type vortex generator (VG) arrays for multirow inline-tube heat exchangers with an emphasis on providing fundamental understanding of the relation between local flow behavior and heat transfer enhancement mechanisms.
Experimental study on inlet turbulent flow under Mar 01, 2019 · Heat transfer enhancement reduces with the growth of flow rate and inlet temperature. At higher temperatures, the influence of augmenting the ultrasonic power is lower. The current results will be useful for designing vibrating heat exchangers.
Heat transfer enhancement - SlideShareJul 29, 2013 · HEAT TRANSFER ENHANCEMENT TECHNIQUES Active method:external power input for the enhancement of heat transfer pulsation by cams and reciprocating plungers magnetic field to disturb seeded light particles in a flowing stream, fluid vibration, jet impingement ,Suction Passive method:surface or geometrical modifications to the flow channel by
Aug 01, 2016 · The coefficient of the fly ash and alumina nanofluid was higher than that of pure water for every flow rate, with mean heat transfer coefficient improvements of 8.7% and 4.2%, respectively. The cold fluid heat transfer coefficient (h cold) increased with increasing flow rates for both hot fluids, pure water and fly ash nanofluid. The maximum improvement was 12% at a hot fly ash nanofluid flow rate
Use of Heat Transfer Enhancement Techniques in the Design Feb 26, 2018 · Heat transfer enhancement refers to application of basic concepts of heat transfer processes to improve the rate of heat removal or deposition on a surface. In the flow of a clean fluid through the tube of a heat exchanger, the boundary layer theorem establishes that a laminar sublayer exists where the fluid velocity is minimal.Heat transfer enhancement and pressure drop in viscous Apr 01, 1992 · Heat transfer enhancement in viscous liquid flows by means of twisted-tape inserts has been investigated in this study. Internal flows in horizontal tubes with uniform wall temperature have been considered. This is representative of typical conditions encountered in practical applications in the chemical and process industry.