0
Technical Brief

Effect of the Asymmetric Baffle Shape on the Thermal Performance Using Non-Newtonian Fluids

[+] Author and Article Information
Mohsen Rostam

Department of Chemical Engineering,
Faculty of Engineering,
University of Mazandaran,
Babolsar Post Box. 416, Iran

Elham Omidbakhsh Amiri

Department of Chemical Engineering,
Faculty of Engineering,
University of Mazandaran,
Babolsar Post Box. 416, Iran
e-mail: e.omidbakhsh@umz.ac.ir

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received April 1, 2018; final manuscript received August 12, 2018; published online September 25, 2018. Assoc. Editor: Yuwen Zhang.

J. Heat Transfer 140(12), 124503 (Sep 25, 2018) (4 pages) Paper No: HT-18-1192; doi: 10.1115/1.4041324 History: Received April 01, 2018; Revised August 12, 2018

The efficiency of industrial heat equipment can be increased using baffles. The shape of baffles is one of the effective parameters. In this work, the effect of shapes of asymmetric baffles on the thermal performance has been investigated. Four different shapes as rectangular diagonal, trapezoidal, triangular and semi-ellipsoid, as well as, vertical rectangle (as the base model) were used. Also, four non-Newtonian fluids were used as the working fluid. The governing equation, which models the physical phenomenon, was solved with the finite volume method. The results showed that better thermal performance could be observed with semi-ellipsoid baffle for all four non-Newtonian fluids. However, for different models of non-Newtonian fluids, the average of increasing of thermal performance with different percent was achieved. By comparing different models of non-Newtonian fluids, shear-thinning model shows better thermal performance than other models.

FIGURES IN THIS ARTICLE
<>
Copyright © 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Promvonge, P. , Sripattanapipat, S. , Tamna, S. , Kwankaomeng, S. , and Thianpong, C. , 2010, “ Numerical Investigation of Laminar Heat Transfer in a Square Channel With 45° Inclined Baffles,” Int. Commun. Heat Mass Transfer, 37(2), pp. 170–177. [CrossRef]
Shamsi, M. R. , Akbari, O. A. , Marzban, A. , Toghraie, D. , and Mashayekhi, R. , 2017, “ Increasing Heat Transfer of Non-Newtonian Nanofluid in Rectangular Microchannel With Triangular Ribs,” Phyisic E, 93, pp. 167–178. [CrossRef]
Heidary, H. , Abbassi, A. , and Kermani, M.-J. , 2013, “ Enhanced Heat Transfer With Corrugated Flow Channel in Anode Side of Direct Methanol Fuel Cells,” Energy Convers. Manage., 75, pp. 748–760. [CrossRef]
Sripattanapipat, S. , and Promvonge, P. , 2009, “ Numerical Analysis of Laminar Heat Transfer in a Channel With Diamond-Shaped Baffles,” Int. Commun. Heat Mass Transfer, 36(1), pp. 32–38. [CrossRef]
Li, P. , Zhang, D. , Xie, Y. , and Xie, G. , 2016, “ Flow Structure and Heat Transfer of Non-Newtonian Fluids in Microchannel Heat Sinks With Dimples and Protrusions,” App. Therm. Eng., 94, pp. 50–58. [CrossRef]
Uppal, A. , Kumar, V. , and Singh, C. , 2014, “ CFD Analysis of Heat Transfer Enhancement in a Heat Exchanger Using Various Baffle Arrangements,” Int. J. Res. Mech. Eng. Technol., 4, pp. 118–122 http://www.ijrmet.com/vol4issue2.2/Ankit-Uppal.pdf.
Pehlivan, H. , 2013, “ Experimental Investigation of Convection Heat Transfer in Converging–Diverging Wall Channels,” Int. J. Heat Mass Transfer, 66, pp. 128–138. [CrossRef]
Animasaun, I. L. , and Pop, I. , 2017, “ Numerical Exploration of a Non-Newtonian Carreau fluid flow Driven by Catalytic Surface Reactions on an Upper Horizontal Surface of a Paraboloid of Revolution, Buoyancy and Stretching at the Free Stream,” Alexanderia Eng. J., 56(4), pp. 647–658. [CrossRef]
Buchanan, J. R. , Kleinstreuer, C. , and Comer, J. K. , 2000, “ Rheological Effects on Pulsatile Hemodynamics in a Stenosed Tube,” Comput. Fluids, 29(6), pp. 695–724. [CrossRef]
Marn, J. , and Ternik, P. , 2006, “ Laminar Flow of a Shear-Thickening Fluid in a 90° pipe bend,” Fluid Dyn. Res., 38(5), pp. 295–312. pp. [CrossRef]
Abraham, F. , Behr, M. , and Heinkenschloss, M. , 2005, “ Shape Optimization in Steady Blood Flow: A Numerical Study of Non-Newtonian Effects,” Comput. Methods Biomech. Biomed. Eng., 8(2), pp. 127–137. [CrossRef]
Tian, T. , Peng, G. , Li, W. , Ding, J. , and Nakano, M. , 2015, “ Experimental and Modelling Study of the Effect of Temperature on Shear Thickening Fluids,” Korea-Australia Rheol. J., 27(1), pp. 1996–2003.
Shaha, N. A. , Animasaun, I. L. , Ibraheem, R. O. , Babatunde, H. A. , Sandeep, N. , and Pop, I. , 2018, “ Scrutinization of the Effects of Grashof Number on the Flow of Different Fluids Driven by Convection Over Various Surfaces,” J. Mol. Liq., 249, pp. 980–990. [CrossRef]
Versteeg, H. K. , and Malalasekera, W. , 1995, An Introduction to Computational Fluid Dynamics, the Finite Volume Method, Longman Scientific and Technical, Wiley, Essex, England.

Figures

Grahic Jump Location
Fig. 1

(a) Schematic of the channel geometry with rectangular baffles, (b) rectangular baffles, (c) rectangular diagonal baffles, (d) trapezoidal baffles, (e) triangular baffles, and (f) semi-ellipsoid baffles

Grahic Jump Location
Fig. 8

Variations of β versus mass flow rates using four different models of non-Newtonian fluids with semi-ellipsoid baffle

Grahic Jump Location
Fig. 7

Variations of β versus mass flow rates using the shear-thickening model

Grahic Jump Location
Fig. 6

Variations of β versus mass flow rates using the shear-thinning model

Grahic Jump Location
Fig. 5

Variations of β versus mass flow rates using the power law model, n > 1

Grahic Jump Location
Fig. 4

Variations of β versus mass flow rates using the power law model, n < 1

Grahic Jump Location
Fig. 3

Validation of the model [4]

Grahic Jump Location
Fig. 2

Viscosity versus shear rate for different non-Newtonian fluids

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In