Turbulent forced convection in microtubes

Ghiaasiaan, S. Mostafa; Laker, Travis S.

doi:10.1016/s0017-9310(00)00320-3

Cited by 68 publications

(10 citation statements)

References 25 publications

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“…We have used the same coefficient for Eqs. (10) and (11), but the temperature depen dent variables have been calculated or evaluated separately for the hot and the cold flow sides.…”

Section: R C T K S a ð12þmentioning

confidence: 99%

“…Finally, other effects have also been stated in the literature, such as the presence of incondensables (Ghiaasiaan and Laker [11]), the micropolar theory (Papautsky et al [12]), the viscous dissipation (Tso and Mahulikar [13 15]) and the electrical double layer, EDL (Mala et al [16], Yang and Li [17,18] and Li [19]). Nevertheless, and as Steinke and Kandlikar [6] stated, all these last factors can be neglected for microchannels with diameters larger than 10 lm.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of fluid flow and heat transfer in a single-phase liquid flow micro-heat exchanger

García-Hernando

Acosta-Iborra

Ruiz-Rivas

et al. 2009

International Journal of Heat and Mass Transfer

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a b s t r a c tThis work presents an experimental analysis of the hydrodynamic and thermal performance of micro heat exchangers. Two micro heat exchangers, characterized by microchannels of 100 Â 100 and 200 Â 200 lm square cross sections, were designed for that purpose. The fluid used was deionized water and there was no phase change along the fluid circuit. The fluid pressure drop along the heat exchanger and the heat transfer were measured and corrections were made to isolate the contribution of the micro channels. The results were compared with the predictions of the classical viscous flow and heat transfer theory. The main conclusions show that the experimental results fit well with these theories. No effects of heat transfer enhancement or pressure drop increase were observed as a consequence of the small scale of the microchannels.

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“…We have used the same coefficient for Eqs. (10) and (11), but the temperature depen dent variables have been calculated or evaluated separately for the hot and the cold flow sides.…”

Section: R C T K S a ð12þmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental investigation of fluid flow and heat transfer in a single-phase liquid flow micro-heat exchanger

García-Hernando

Acosta-Iborra

Ruiz-Rivas

et al. 2009

International Journal of Heat and Mass Transfer

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“…The hydrodynamic and thermal characteristics of flow in microtubes have been widely studied [1][2][3][4][5]. The one-dimensional character of flow in microtubes makes the analysis simpler relative to the flow in microchannels of non-circular shape, which requires a two-dimensional analysis.…”

Section: Introductionmentioning

confidence: 99%

Thermal and hydrodynamic analysis of gaseous flow in trapezoidal silicon microchannels

Kuddusi

Cetegen

2009

International Journal of Thermal Sciences

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“…Ghiaasiaan and Laker [30] suggested that suspended microscopic particles in coolant water could significantly affect the turbulence and heat transfer near the walls in microgeometries. Regular untreated water was used in the present experiment and a commercial pump with cast iron fittings was used to pressurize the water.…”

Section: Comparison With Available Correlationsmentioning

confidence: 99%

Experimental Study of Forced Convection Heat Transfer of Water in a Short Microduct at a Turbulent Reynolds Number

Syed

Mukherjee

2012

Heat Transfer Engineering

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The present study deals with experimental investigation of cooling of machining tools, by water flowing through a microduct at the tip of the tool. The average diameter of the microduct is 200 µm and the flow takes place at a turbulent Reynolds number. The outer wall temperature of the tool and the temperature of water at inlet and exit have been measured. The convective heat transfer coefficient is calculated at different wall temperatures and mass flux. The experimental results show that the average Nusselt numbers in the short microduct are higher than those predicted by conventional correlations for large-diameter ducts. This enhancement may be attributed to the micro size of the duct, entry effects, transition from laminar to turbulent flow at the microduct entrance, suspended microscopic particles in coolant water, and Prandtl number estimation based on the mean fluid temperature. A correlation has been proposed to compute convective heat transfer during turbulent flow through a short microduct of a particular geometry for a range of Reynolds and Prandtl numbers.

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Turbulent forced convection in microtubes

Cited by 68 publications

References 25 publications

Experimental investigation of fluid flow and heat transfer in a single-phase liquid flow micro-heat exchanger

Experimental investigation of fluid flow and heat transfer in a single-phase liquid flow micro-heat exchanger

Thermal and hydrodynamic analysis of gaseous flow in trapezoidal silicon microchannels

Experimental Study of Forced Convection Heat Transfer of Water in a Short Microduct at a Turbulent Reynolds Number

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