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Alternative Method for Measurement of Apparent Viscosity of Gas Solid Fluidized Bed


Affiliations
1 Thermal Engineering Raipur Institute of Technology, Raipur, C.G., India
2 Department of mechanical Engineering, Raipur Institute of Technology, Raipur, C.G.,, India
     

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An alternative method is used for determining the apparent viscosity of fluidized bed. For determining the apparent viscosity, the bed should be in a fluidized state therefore the knowledge of minimum fluidizing velocity is required. The solid particle that are used for bed material are Green pea (ρ=1428.57 kg/m3), coal (ρ=1538.46 kg/m3) and sand ((ρ= 2666.7 kg/m3).Air is used to fluidize the fixed bed. Before performing the experiment material have been crushed and sieved into three different sizes i.e. 2 mm, 6mm, and 8mm. The experiments are conducted in an acrylic pipe of 4 cm internal diameter having length of pipe is 100 cm. The experiments have been done for different static packed bed height 4cm. 6cm, 8cm, 10cm. During investigation apparent viscosity of fluidized bed in dense phase is determined, this is helpful for knowing the fluidity of the fluidized bed. Apparent viscosity of fluidized is determined by measuring the velocity of the thin strip inside the fluidized bed and weight required for that velocity is known. The apparent viscosity is determined for green pea (ρ=1428.57 kg/m3), coal (ρ=1538.46 kg/m3) and sand (ρ= 2666.7 kg/m3) for three different size i.e. 2 mm, 6mm, 8mm and varying the static packed bed height (4cm. 6cm, 8cm, 10cm,) during fluidized bed .It is found that apparent viscosity increases with increasing the density of the particle and size of the particle and apparent viscosity is independent of static bed height

Keywords

Apparent Viscosity, Gas Solid Fluidization, Minimum Fluidization Velocity, Fluidity of Fluidized Bed, Dense Phase.
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  • Takami Kai, Masiahiro Murakami, Ken-Ichi Yamasaki and Takeshige Takahashi, “Relationship between Apparent Bed Viscosity and Fluidization Quality in a Fluidized Bed with fine particle” Journal of Chemical Engineering of Japan, Vol. 24 No. 4 ,1991

  • L.G. Gibilaro, K. Gallucci, R. Di Felice, P. Pagliai, “On the apparent viscosity of a fluidized bed” Elsevier Chemical Engineering Science 62 (2007), pp. 294 – 300, 2007

  • J. R. Grace, “The Viscosity of Fluidized Beds”, The Canadian Journal of Chemical Engineering Vol. 48, February, 1970

  • Alessandro Colafigli, Luca Mazzei, Paola Lettieri, Larry Gibilaro, “Apparent viscosity measurements in a homogeneous gas-fluidized bed”, ELSEVIER Chemical Engineering Science, pp. 144-152, 2008

  • A. C. Rees, J. F. Davidson, J. S. Dennis and A. N. Hayhurst “The Apparent Viscosity of The Particulate Phase of Bubbling GasFluidized Beds A Comparison of the Falling or Rising Sphere Technique with Other Methods, Department of Chemical Engineering, University of Cambridge, Vol. 85 (A10), pp. 1341– 1347, 2007

  • P. Anjaneylu, D.V Khakhar, ”Rheology of Gas-Fluidized Bed” Elsevier powder technology, pp. 29-34, 1994

  • Basma Abdulhadi Badday, A.V.S.S.K.S. Gupta, Ammar Arab Beddai, M. T. Naik, “Experimental Study on the Bed Voidage and Minimum Fluidization Velocity of Gas-Solid Fluidization under Different Conditions” IPASJ International Journal of Mechanical Engineering, Volume 2, pp. 22-26

  • Aamirfarshi, “Experimental Measurement of Different Fluidization Parameters” Research Institute of Petroleum and Coal Iran, ISSN 1337-7027, pp. 311-321, 2013

  • Anwar johari and MohdRozaineeTaib, “The Effect of Different Sand Sizes on the Fluidization Behavior in Circular and Rectangular Columns”, Journal of Chemical and Natural Resources Engineering, UniversitiTeknologi Malaysia, pp. 2:14-21

  • D.C. Sau, S. Mohantyband K.C. Biswal, “Minimum fluidization velocities and maximum bed pressure drops for gas–solid tapered fluidized beds” chemical engineering journal volume 132, pages 151-157, august 2007

  • A. E. Ghaly1, A. Ergudenler1 and V. V. Ramakrishna, “Effect of Distributor Plate Configuration on Pressure Drop in a Bubbling Fluidized Bed Reactor” science domain international Advances in Research pp 251-268, 2015, Article no.AIR.2015.021 ISSN: 2348-0394

  • Y.K Mohanty, G.K Biswal, and G.K Roy, “Effect of Column Diameter on Dynamics of Gas Solid Fluidized Bed” Indian Journal of Chemical Technology, Vol. 16 pp.17-24, January 2009

  • Anusaya M. salwe, Shubham S. Pande, Juned S. Khan, 2014, “Effect of Velocity and Particle Size on the Coefficient of Heat Transfer in Fluidized Bed Heat Exchanger” International Journal of Engineering Research and General Science Volume 2, ISSN 2091-2730, pp. 230-235

  • M. H. Khoshtaghazaa, R. Amiri Chayjan, E 2008, “effect of some physical properties on fluidisation stability of grain products” ELSEVIER, pp. 192-197

  • M. Ye, M.A. van der Hoef, J.A.M. Kuipers , 2005, “The effects of particle and gas properties on the fluidization of Geldart A particles” ELSEVIER, pp. 4567 – 4580

  • G.K. Roy and K.C. Biswal and B.B. Samal, 1983 “Dynamics of gas solid fluidization of regular particles in conical vessel” Journal of Institute of engineers (India) , Vol.65 CH-1 , pp.15 – 17

  • Sawsan A. M. Mohammed, 2010 “Hydrodynamic Studies of Bed Expansion in Liquid Solid Fluidized Bed” Journal of Engineering, Volume 16 , pp. 5398- 5410.

  • Takami KAI and Shintaro FURUSAKI, 1986 “Effect of gas properties on the behavior of fluidized bed of small particle” Journal of chemical engineering japan, volume 19, pp. 67-71

  • R. K. Padhi, Y. K. Mohanty, G. K. Roy, B. Sarangi, 2014 “Hydrodynamic study of gas solid fluidization in non-cylindrical conduits for spherical and non-spherical particle” International Journal of Scientific and Research Publications, Volume 4, ISSN 2250-3153


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  • Alternative Method for Measurement of Apparent Viscosity of Gas Solid Fluidized Bed

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Authors

Abhishek Sahu
Thermal Engineering Raipur Institute of Technology, Raipur, C.G., India
Saurabh Kumar
Department of mechanical Engineering, Raipur Institute of Technology, Raipur, C.G.,, India

Abstract


An alternative method is used for determining the apparent viscosity of fluidized bed. For determining the apparent viscosity, the bed should be in a fluidized state therefore the knowledge of minimum fluidizing velocity is required. The solid particle that are used for bed material are Green pea (ρ=1428.57 kg/m3), coal (ρ=1538.46 kg/m3) and sand ((ρ= 2666.7 kg/m3).Air is used to fluidize the fixed bed. Before performing the experiment material have been crushed and sieved into three different sizes i.e. 2 mm, 6mm, and 8mm. The experiments are conducted in an acrylic pipe of 4 cm internal diameter having length of pipe is 100 cm. The experiments have been done for different static packed bed height 4cm. 6cm, 8cm, 10cm. During investigation apparent viscosity of fluidized bed in dense phase is determined, this is helpful for knowing the fluidity of the fluidized bed. Apparent viscosity of fluidized is determined by measuring the velocity of the thin strip inside the fluidized bed and weight required for that velocity is known. The apparent viscosity is determined for green pea (ρ=1428.57 kg/m3), coal (ρ=1538.46 kg/m3) and sand (ρ= 2666.7 kg/m3) for three different size i.e. 2 mm, 6mm, 8mm and varying the static packed bed height (4cm. 6cm, 8cm, 10cm,) during fluidized bed .It is found that apparent viscosity increases with increasing the density of the particle and size of the particle and apparent viscosity is independent of static bed height

Keywords


Apparent Viscosity, Gas Solid Fluidization, Minimum Fluidization Velocity, Fluidity of Fluidized Bed, Dense Phase.

References