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Investigation of thermo-fluid behavior of mixed convection heat transfer of different dimples-protrusions wall patterns to heat transfer enhancement

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Abstract

This study is a numerical investigation of the effect of improving heat transfer namely, modified rough (dimples and protrusions) surfaces on the mixed convective heat transfer of a turbulent flow in a horizontal tube. The effects of different dimples-protrusions arrangements on the improving the thermal performance of a rough tube are investigated at various Richardson numbers. Three dimensional governing equations are discretized by the finite-volume technique. Based on the obtained results the dimples-protrusions arrangements are modified to find a suitable configuration for which heat transfer coefficient and pressure drop to be balanced. Modified dimples-protrusions arrangements that shows higher performance is presented. Its average thermal performance 18% and 11% is higher than the other arrangements. In addition, the results show that roughening a smooth tube is more effective at the higher Richardson number.

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Abbreviations

A(m2):

Surface of heat transfer

C1ε,C2ε :

constants

Cp(J/kg. k):

Specific heat

D(m):

Tube diameter

e/D:

Dimensionless height of the roughs

\( f=\frac{\Delta p}{\frac{{\rho V}^2}{2}\left(\frac{L}{D}\right)} \) :

Friction factor.

g(m/s2):

Gravitational acceleration

h(W/m2. K):

Heat transfer coefficient

k:

Turbulent kinetic energy

P/D:

Dimensionless pitch of the roughs

PEC:

Performance evaluation criteria

\( \mathrm{Ri}=\frac{\mathrm{Gr}}{{\operatorname{Re}}^2} \) :

Richardson number

S:

User-defined source terms

T:

Temperature

\( {\mathrm{T}}^{\ast }=\frac{{\mathrm{T}}_{\mathrm{w}}-\mathrm{T}}{{\mathrm{T}}_{\mathrm{w}}-{\mathrm{T}}_{\mathrm{i}}} \) :

Normalized temperature

\( {\mathrm{X}}^{\ast }=\frac{\mathrm{r}}{\mathrm{D}} \) :

Normalized radius in direction of horizontal tube diameter

\( {\mathrm{Y}}^{\ast }=\frac{\mathrm{r}}{\mathrm{D}} \) :

Normalized radius in direction of vertical tube diameter

\( {\mathrm{Z}}^{\ast }=\frac{\mathrm{z}}{\mathrm{D}} \) :

Normalized length in axial direction

α:

Thermal diffusivity

β:

Volumetric expansion coefficient (K− 1)

ε:

Dissipation of turbulent kinetic energy

μ:

Dynamic viscosity (Nm s− 2)

ν :

kinematic viscosity of the fluid, (m2/s)

ρ:

fluid density (kg m−3)

i:

Inlet

b:

Bulk

eff:

Effective

f:

Fluid

fc:

Forced convection

t:

Turbulent

w:

Wall

References

  1. Bergles AE (1998) Handbook of heat transfer. McGraw-Hill, New York

  2. Siddique M, Khaled A-R, Abdulhafiz N, Boukhary A (2010) Recent advances in heat transfer enhancements: a review report. Int J Chem Eng, Article ID 106461, p 28

  3. Gee DL, Webb R (1980) Forced convection heat transfer in helically rib-roughened tubes. Int J Heat Mass Transf 23(8):1127–1136

    Article  Google Scholar 

  4. Vicente PG, Garcı́a A, Viedma A (2002) Experimental study of mixed convection and pressure drop in helically dimpled tubes for laminar and transition flow. Int J Heat Mass Transf 45(26):5091–5105

    Article  Google Scholar 

  5. Vicente PG, Garcı́a A, Viedma A (2002) Heat transfer and pressure drop for low Reynolds turbulent flow in helically dimpled tubes. Int J Heat Mass Transf 45(3):543–553

    Article  Google Scholar 

  6. Elyyan MA, Tafti DK (2007) LES investigation of flow and heat transfer in a channel with dimples and protrusions. Power Land, Sea and Air. ASME Turbo Expo GT2007-27811, Montreal

  7. Li R, He YL, Lei YG, Tao YB, Chu P (2009) Numerical study on fluid flow and heat transfer performance of internally roughened tubes with dimples. J Enhanced Heat Transf 16(3):267–285

    Article  Google Scholar 

  8. Chang S, Chiang K, Chou T (2010) Heat transfer and pressure drop in hexagonal ducts with surface dimples. J. Exp Thermal Fluid Sci 34(8):1172–1181

    Article  Google Scholar 

  9. Wang Y, He YL, Lei YG, Zhang J (2010) Heat transfer and hydrodynamics analysis of a novel dimpled tube. J. Exp Thermal Fluid Sci 34(8):1273–1281

    Article  Google Scholar 

  10. Suresh S, Chandrasekar M, Sekhar SC (2011) Experimental studies on heat transfer and friction factor characteristics of CuO/water nanofluid under turbulent flow in a helically dimpled tube. J Experimental Thermal and Fluid Science 35(3):542–549

    Article  Google Scholar 

  11. Garcia A (2012) The influence of artificial roughness shape on heat transfer enhancement: corrugated tubes, dimpled tubes and wire coils. Appl Therm Eng 35:196–201

    Article  Google Scholar 

  12. Lan J, Xie Y, Zhang D (2012) Flow and heat transfer in microchannels with dimples and protrusions. J Heat Transf 134:021901–021901

    Article  Google Scholar 

  13. Kukulka DJ, Smith R (2013) Thermal-hydraulic performance of Vipertex 1EHT enhanced heat transfer tubes. Appl Therm Eng 61(1):60–66

    Article  Google Scholar 

  14. Forooghi P, Hooman K (2013) Effect of buoyancy on turbulent convection heat transfer in corrugated channels–a numerical study. Int J Heat Mass Transf 64:850–862

    Article  Google Scholar 

  15. Li Z, Wu Y, Tang G, Zhang D, Lu J (2015) Comparison between heat transfer to supercritical water in a smooth tube and in an internally ribbed tube. Int J Heat Mass Transf 84:529–541

    Article  Google Scholar 

  16. Li Z, Wu Y, Tang G, Lu J, Wang H (2016) Numerical analysis of buoyancy effect and heat transfer enhancement in flow of supercritical water through internally ribbed tubes. Appl Therm Eng 98:1080–1090

    Article  Google Scholar 

  17. Navaei A, Mohammed HA, Munisamy KM, Yarmand H, Gharehkhani S (2015) Heat transfer enhancement of turbulent nanofluid flow over various types of internally corrugated channels. Powder Technol 286:332–341

    Article  Google Scholar 

  18. Kumar P, Kumar A, Chamoli S (2016) Experimental investigation of heat transfer enhancement and fluid flow characteristics in a protruded surface heat exchanger tube. J. Exp Thermal Fluid Sci 71:42–51

    Article  Google Scholar 

  19. Huang Z, Li ZY, Yu GL, Tao WQ (2017) Numerical investigations on fully-developed mixed turbulent convection in dimpled parabolic trough receiver tubes. Appl Therm Eng 114:1287–1299

    Article  Google Scholar 

  20. Webb R, Kim NH (2005) Principles of enhanced heat transfer. Taylor & Francis, New York

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Authors and Affiliations

  1. Mechanical Engineering Department, University of Sistan and Baluchestan, Zahedan, Iran

    M. Sobhani & A. Behzadmehr

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  1. M. Sobhani
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  2. A. Behzadmehr
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Correspondence to A. Behzadmehr.

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Sobhani, M., Behzadmehr, A. Investigation of thermo-fluid behavior of mixed convection heat transfer of different dimples-protrusions wall patterns to heat transfer enhancement. Heat Mass Transfer 54, 3219–3229 (2018). https://doi.org/10.1007/s00231-018-2356-9

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  • DOI: https://doi.org/10.1007/s00231-018-2356-9

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