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Effect of slip on entropy generation in a single rotating disk in MHD flow

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  • Arikoglu, Aytac
  • Ozkol, Ibrahim
  • Komurgoz, Guven

Abstract

In the present study, the effect of slip on entropy generation in magnetohydrodynamic (MHD) flow over a rotating disk is investigated by semi-numerical analytical solution technique. The nonlinear governing equations of flow and thermal fields are reduced to ordinary differential equations by the Von Karman approach, then solved via differential transform method (DTM), a recently-developed, powerful analytical method. Related entropy generation equations are derived and nondimensionalized using geometrical and physical flow field-dependent parameters. For a rotating surface the form of slip introduced into the governing equations is rarefaction. For comparison, slip and no-slip regimes in the range 0.1 > Kn > 0 and their interaction with magnetic effects are investigated by minimum entropy generation. While minimizing entropy generation, equipartitioning is encountered between fluid friction irreversibility and Joule dissipation.

Suggested Citation

  • Arikoglu, Aytac & Ozkol, Ibrahim & Komurgoz, Guven, 2008. "Effect of slip on entropy generation in a single rotating disk in MHD flow," Applied Energy, Elsevier, vol. 85(12), pages 1225-1236, December.
    • Handle: RePEc:eee:appene:v:85:y:2008:i:12:p:1225-1236
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    References listed on IDEAS

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    1. Johannessen, Eivind & Røsjorde, Audun, 2007. "Equipartition of entropy production as an approximation to the state of minimum entropy production in diabatic distillation," Energy, Elsevier, vol. 32(4), pages 467-473.
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    Cited by:

    1. Shamshiri, Mehdi & Khazaeli, Reza & Ashrafizaadeh, Mahmud & Mortazavi, Saeed, 2012. "Heat transfer and entropy generation analyses associated with mixed electrokinetically induced and pressure-driven power-law microflows," Energy, Elsevier, vol. 42(1), pages 157-169.
    2. Shamshiri, Mehdi & Ashrafizaadeh, Mahmud & Shirani, Ebrahim, 2012. "Advantages and disadvantages associated with introducing an extra rarefied gas layer into a rotating microsystem filled with a liquid lubricant: First and second law analyses," Energy, Elsevier, vol. 45(1), pages 716-728.
    3. Shamshiri, Mehdi & Ashrafizaadeh, Mahmud & Shirani, Ebrahim, 2012. "Effects of rarefaction, viscous dissipation and rotation mode on the first and second law analyses of rarefied gaseous slip flows confined between a rotating shaft and its concentric housing," Energy, Elsevier, vol. 37(1), pages 359-370.
    4. Tipole, Pralhad & Karthikeyan, A. & Bhojwani, Virendra & Patil, Abhay & Oak, Ninad & Ponatil, Amal & Nagori, Palash, 2016. "Applying a magnetic field on liquid line of vapour compression system is a novel technique to increase a performance of the system," Applied Energy, Elsevier, vol. 182(C), pages 376-382.
    5. Rashidi, M.M. & Ali, M. & Freidoonimehr, N. & Nazari, F., 2013. "Parametric analysis and optimization of entropy generation in unsteady MHD flow over a stretching rotating disk using artificial neural network and particle swarm optimization algorithm," Energy, Elsevier, vol. 55(C), pages 497-510.
    6. Khan, Mair & Salahuddin, T. & Lv, Yu-Pei, 2021. "Entropy study in the von Kármán model with variable thermo-physical properties and radiation," Chaos, Solitons & Fractals, Elsevier, vol. 147(C).

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