Prediction of turbulent forced convection of a nanofluid in a tube with uniform heat flux using a two phase approach

Turbulent forced convection heat transfer in a circular tube with a nanofluid consisting of water and 1 vol.% Cu is studied numerically. Two phase mixture model has been implemented for the first time to study such a flow field. A single phase model formulation, which has been used frequently in the past for heat transfer with nanofluids, is also used for comparison with the mixture model. The comparison of calculated results with experimental values shows that the mixture model is more precise than the single phase model. The axial evolution of the flow field and fully developed velocity profiles at different Reynolds numbers are also presented and discussed.

[1]  Q. Xue.  Model for effective thermal conductivity of nanofluids , 2003 .

[2]  M. Manninen,et al.  On the mixture model for multiphase flow , 1996 .

[3]  W. Roetzel,et al.  Conceptions for heat transfer correlation of nanofluids , 2000 .

[4]  C. T. Nguyen,et al.  Numerical investigation of laminar flow and heat transfer in a radial flow cooling system with the use of nanofluids , 2004 .

[5]  M. Hussaini,et al.  Two-phase flow of solid hydrogen particles and liquid helium , 2004 .

[6]  J. Eastman,et al.  Measuring Thermal Conductivity of Fluids Containing Oxide Nanoparticles , 1999 .

[7]  H. Masuda,et al.  ALTERATION OF THERMAL CONDUCTIVITY AND VISCOSITY OF LIQUID BY DISPERSING ULTRA-FINE PARTICLES. DISPERSION OF AL2O3, SIO2 AND TIO2 ULTRA-FINE PARTICLES , 1993 .

[8]  Y. Xuan,et al.  Aggregation structure and thermal conductivity of nanofluids , 2003 .

[9]  K. Kasza,et al.  Measurements of pressure drop and heat transfer in turbulent pipe flows of particulate slurries , 1988 .

[10]  Dimitri Gidaspow,et al.  Dense, vertical gas‐solid flow in a pipe , 1992 .

[11]  Young I Cho,et al.  HYDRODYNAMIC AND HEAT TRANSFER STUDY OF DISPERSED FLUIDS WITH SUBMICRON METALLIC OXIDE PARTICLES , 1998 .

[12]  C. T. Nguyen,et al.  Heat transfer behaviours of nanofluids in a uniformly heated tube , 2004 .

[13]  Y. Xuan,et al.  Heat transfer enhancement of nanofluids , 2000 .

[14]  Xianfan Xu,et al.  Thermal Conductivity of Nanoparticle -Fluid Mixture , 1999 .

[15]  K. Khanafer,et al.  BUOYANCY-DRIVEN HEAT TRANSFER ENHANCEMENT IN A TWO-DIMENSIONAL ENCLOSURE UTILIZING NANOFLUIDS , 2003 .

[16]  B. Launder,et al.  Lectures in mathematical models of turbulence , 1972 .

[17]  Y. Xuan,et al.  Investigation on Convective Heat Transfer and Flow Features of Nanofluids , 2003 .

[18]  M. Ishii.  Thermo-fluid dynamic theory of two-phase flow , 1975 .

[19]  G. Ahmadi,et al.  Modeling of heat transfer in turbulent gas–solid flow , 2002 .

[20]  C. A. Depew,et al.  Heat Transfer to Pneumatically Conveyed Glass Particles of Fixed Size , 1963 .

[21]  S. Phillpot,et al.  Mechanisms of heat flow in suspensions of nano-sized particles (nanofluids) , 2002 .

[22]  Clayton T. Crowe,et al.  Numerical models for two-phase turbulent flows , 1996 .

[23]  E. Grulke,et al.  Anomalous thermal conductivity enhancement in nanotube suspensions , 2001 .