Influence of nanofluids on mixed convective heat transfer over a horizontal backward-facing step

2011 ◽  
Vol 40 (4) ◽  
pp. 287-307 ◽  
Author(s):  
H.A. Mohammed ◽  
A.A. Al-aswadi ◽  
H.I. Abu-Mulaweh ◽  
N.H. Shuaib
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Backward Facing Step

scholarly journals The Influence of the Recirculation Region: A Comparison of the Convective Heat Transfer Downstream of a Backward-Facing Step and Behind a Jet in a Cross Flow

1989 ◽  
Author(s):  
V. Scherer ◽  
S. Wittig
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Cross Flow ◽  
Separated Flows ◽  
Numerical Code ◽  
Recirculation Region ◽  
Backward Facing Step ◽  
Nusselt Numbers ◽  
Wide Range

Convective heat transfer is examined in two typical examples of separated flows, namely: the flow over a backward-facing step and a two-dimensional jet entering a cross flow. Local Nusselt numbers were determined in and behind the recirculation region. The main parameters influencing the heat transfer, the Reynolds number and the momentum flux ratio of the jet and the cross flow, have been varied in a wide range. In addition to heat transfer measurements, the flow field has been documented using a LDA-system and oil film techniques. The static pressure distribution at the wall within the separated flow is also given. The measurements are compared with the results of a numerical code, based on a finite volume method, where the well known k-ε-model is employed. The differences in Nusselt numbers predicted with a one- and a two-layer model are shown to demonstrate the influence of wall functions on heat transfer. The numerical and experimental results are compared with available data, and the differences and similarities in the heat transfer behaviour of separated flows are discussed.

scholarly journals INCREASE IN CONVECTIVE HEAT TRANSFER OVER A BACKWARD-FACING STEP IMMERSED IN A WATER-BASED TiO2 NANOFLUID

2018 ◽  
Vol 49 (15) ◽  
pp. 1419-1429 ◽  
Author(s):  
C. S. Oon ◽  
Ahmad Amiri ◽  
B. T. Chew ◽  
S. N. Kazi ◽  
A. Shaw ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Backward Facing Step ◽  
Water Based

The Influence of the Recirculation Region: A Comparison of the Convective Heat Transfer Downstream of a Backward-Facing Step and Behind a Jet in a Crossflow

1991 ◽  
Vol 113 (1) ◽  
pp. 126-134 ◽  
Author(s):  
V. Scherer ◽  
S. Wittig
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Flux Ratio ◽  
Separated Flows ◽  
Numerical Code ◽  
Recirculation Region ◽  
Backward Facing Step ◽  
Nusselt Numbers ◽  
Wide Range

Convective heat transfer is examined in two typical examples of separated flows, namely, the flow over a backward-facing step and a two-dimensional jet entering a crossflow. Local Nusselt numbers were determined in and behind the recirculation region. The main parameters influencing the heat transfer, the Reynolds number, and the momentum flux ratio of the jet and the crossflow have been varied over a wide range. In addition to heat transfer measurements, the flow field has been documented using an LDA system and oil film technique. The static pressure distribution at the wall within the separated flow is also given. The measurements are compared with the results of a numerical code, based on a finite volume method, where the well known k-ε model is employed. The differences in Nusselt numbers predicted with one- and two-layer models are shown to demonstrate the influence of wall functions on heat transfer. The numerical and experimental results are compared with available data, and the differences and similarities in the heat transfer behavior of separated flows are discussed.

Sign in / Sign up

Export Citation Format

Share Document