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1700102 Vol 1 · Issue 5 Download Paper

Characteristics Of Non-Newtonian Fluids Over Tube Banks

Er. R. P. Ram

Subject area: Science,Engineering and Technology  ·  Area of research: Chemical Engineering

Abstract

Forced convection characteristics of non-Newtonian fluids over the tube banks have been studied numerically for the following governing parameters: solid volume fractions of the cylinders; = 0.20, 0.25 and 0.30, Reynolds number; Re= 1, 5 and 10; power-law index n= 0.8, 1 and 1.4 and at a fixed value of Prandtl number of Pr=1. The flow and thermal features such as streamlines, isotherm patterns, drag coefficients and mean or average Nusselt number etc. have been explored and found to be strongly dependent over the above parameters. The drag coefficients were seen to be increased with the increasing values of solid volume fractions and power-law index, whereas, an opposite behavior was noticed with increasing Reynolds number. Further, the mean Nusselt number were found to be enhanced with increasing values of Reynolds numbers and porosity, but a decrease was noticed with increasing value of power-law index. Overall, a non-monotonous behavior has been observed for both flow and heat transfer features of non-Newtonian fluids through the tube banks.

Keywords

Porosity, Nusselt number, Power-law index, Drag coefficients, Cylinders

References

[1] Sangani, A. S., Acrivos, A., 1982, Slow flow past periodic arrays of cylinders with application to heat transfer, Int. J. Multiphase Flow, 8, pp. 193- 206.

[2] Drummond, J. E., Tahir, M. I., 1984, Laminar viscous flow through regular arrays of parallel solid cylinders, Int. J. Multiphase Flow, 10, pp. 515- 540.

[3] Vijaysri, M., Chhabra R. P., Eswaran V., 1999, Power-law fluid flow across an array of in7nite circular cylinders: a numerical study, J. Non-Newt Fluid Mech., 87, pp. 263-282.

[4] Mandhani, V. K., Chhabra, R. P., Eswaran, V., 2002, Forced convection heat transfer in tube banks in cross flow, Chem. Eng. Sci., 57, pp. 379-391.

[5] Martin, A. R., Saltiel, C., Shyy, W., 1998, Frictional losses and convective heat transfer in sparse, periodic cylinder arrays in cross flow, Int. J. Heat Mass Transfer, 41, pp. 2383- 2397.

[6] Koch, D. L., Ladd, A. J. C., 1997, Moderate Reynolds number flows through periodic and random arrays of aligned cylinders, J. Fluid Mech., 349, 31-66.

[7] Gamrat, G., Marinet, M. F., Stephane, L. P., 2008, Numerical study of heat transfer over banks of rods in small Reynolds number cross n=1.4n=1 R e = 1 0 R e = 1 0 FLOW R e = 1       s       s n=0.8 R e = 1 0.2 0.24 0.28 0.32 2 2.5 3  s Nu (c)Re=10 0.2 0.24 0.28 0.32 2 2.5 3 n=0.8 n=1 n=1.4  s Nu (a)Re=1 0.2 0.24 0.28 0.32 2 2.5 3  s Nu (b)Re=5 flow, Int. J. Heat Mass Transfer, 51, pp. 853- 864.

[8] Abrate, S., 2002, Resin flow in fiber preforms, Applied Mech. Reviews, 55, pp. 579-599.

[9] Ghosh, U. K., Upadhyay, S. N., 1994, Chhabra R P. Heat and mass transfer from immersed bodies to non-Newtonian fluids, Adv. Heat Transfer, 25, pp. 251-319.

[10] Chhabra, R. P., Richardson, J. F., 1999, Non- Newtonian Flow in the Process Industries, Butterwoth-Heinemann, Oxford, 1999.

[11] Chhabra, R P. 1999, In advances in the flow and Rheology of non-Newtonian fluids. Elsevier, Amsterdam, 1999; Chapter 39.

[12] Soares, A. A., Ferreira, J. M., Chhabra, R P., 2005, Flow and Forced Convection Heat Transfer in Crossflow of non-Newtonian fluids over a circular, Ind. Eng. Chem. Res., 44 pp. 5815-5827.

[13] Spelt, P. D. M., Selerland, T., Lawrence, C. J., Lee, P. D., 2005, Flow of inelastic Non- Newtonian fluids through arrays of aligned cylinders, Part II (Inertial effects for square arrays), J. Eng. Math., 51, pp. 81-97.

[14] Bruschke, M. V., Advani, S. G., 1993, Flow of generalized Newtonian fluids across a periodic array of cylinders, J. Rheo., 37, pp. 479-493.

[15] Mangadoddy, N. Bharti, R. P., Chhabra, R. P., Eswaran, V., 2004, Forced convection in cross flow of power-law fluids over a tube bank, Chem. Eng. Sci., 59, pp. 2213-2222.

[16] Bird, R. B., Stewart, W. E., Lightfoot, E. N., 2002, Transport Phenomena, 2nd Edition. Wiley, New York pp. 113).

[17] Bharti, R. P., Chhabra, R. P., Eswaran, V., 2007, Steady forced convection heat transfer from a heated circular cylinder to power-law fluids, Int. J. Heat Mass Transfer, 50, pp. 977- 990.

How to cite this paper

Er. R. P. Ram "Characteristics Of Non-Newtonian Fluids Over Tube Banks " Iconic Research And Engineering Journals Volume 1 Issue 5 2017 Page 23-28
Er. R. P. Ram "Characteristics Of Non-Newtonian Fluids Over Tube Banks " Iconic Research And Engineering Journals, vol. 1, no. 5, Nov. 2017
Er. R. P. Ram (2017). Characteristics Of Non-Newtonian Fluids Over Tube Banks . Iconic Research And Engineering Journals, 1(5).
Er. R. P. Ram "Characteristics Of Non-Newtonian Fluids Over Tube Banks " Iconic Research And Engineering Journals, vol. 1, no. 5, Nov. 2017.
@article{1700102,
      author = {Er. R. P. Ram},
      title = {Characteristics Of Non-Newtonian Fluids Over Tube Banks },
      journal = {Iconic Research And Engineering Journals},
      year = {2017},
      volume = {1},
      number = {5},
      pages = {23-28},
      issn = {2456-8880},
      url = {https://www.irejournals.com/formatedpaper/1700102.pdf},
      abstract = {Forced convection characteristics of non-Newtonian fluids over the tube banks have been studied numerically for the following governing parameters: solid volume fractions of the cylinders; = 0.20, 0.25 and 0.30, Reynolds number; Re= 1, 5 and 10; power-law index n= 0.8, 1 and 1.4 and at a fixed value of Prandtl number of Pr=1. The flow and thermal features such as streamlines, isotherm patterns, drag coefficients and mean or average Nusselt number etc. have been explored and found to be strongly dependent over the above parameters. The drag coefficients were seen to be increased with the increasing values of solid volume fractions and power-law index, whereas, an opposite behavior was noticed with increasing Reynolds number. Further, the mean Nusselt number were found to be enhanced with increasing values of Reynolds numbers and porosity, but a decrease was noticed with increasing value of power-law index. Overall, a non-monotonous behavior has been observed for both flow and heat transfer features of non-Newtonian fluids through the tube banks.},
      keywords = {Porosity, Nusselt number, Power-law index,    Drag coefficients, Cylinders},
      month = {November},
  }