Heat transfer of g as-suspension flow in horizontal and vertical tubes

Mamaev, V. V.; Nosov, V. S.; Syromyatnikov, N. I.; Barbolin, V. S.

doi:10.1007/bf00861060

Cited by 4 publications

(2 citation statements)

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“…Analytical and numerical analysis for laminar pipe flow showed that the influence of pulsation on Nu is more pronounced in the entrance region of the pipe and small at the downstream end [9,18,21,22,25]. The same observation was made by Habib et al [20] in their experimental investigation.…”

Section: Introductionsupporting

confidence: 65%

“…Krishna and Sastri [11] showed that pulsating flow does not have any effect on the total heat transfer for very long heat exchangers but the influence was very significant for short heat exchangers. Both heat transfer enhancement and reduction were detected in a single experiment in [7,20,21]. In terms of axial locations of the channel, both heat transfer enhancement and reduction were described in [18,22] when pulsation was applied.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Flow Pulsation on Forced Convection in a Channel Containing Regularly Spaced Nonconducting Fins

2010

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The effects of pulsating flow on forced convection in a rectangular channel containing a series of regularly spaced, nonconducting inserts were investigated experimentally. Based on the experimental data, a correlation equation was developed. The steady-flow Reynolds number Re in the laminar range, Re < 1200, was examined. The Prandtl number of the working fluid Pr = 15 and the oscillation was generated using low-frequency oscillation at f < 50 Hz and amplitude A < 1 mm. The energy dissipation as a result of applied oscillation was determined by phase-resolved measurements of pressure difference and liquid displacement. The system shows improved convective heat transfer towards a low Reynolds number. At a higher Reynolds number, the influence of the oscillation diminished and the flow approaches a steady finned flow. The predictions of the developed correlation equation are in good agreement with the experimental data. The calculated power input due to oscillation is comparatively low and decreases towards increasing net flow rates where the oscillating flow has a diminishing effect.

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