Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Analytical study of the continuous regime effects of hydrogen-air mixture put into a micro-channel with platinum catalytic surface

Authors
sayyed Aboozar Fanaee 1
Mina Rajaee 2
1 Department of Mechanic, Facualty of Engineering, University of Birjand, Birjand, Iran
2 Deparment of Mechanics, University of Birjand
Abstract
In this paper, the analytical investigation of two thermal and mass transfer effects for non-homogeneous catalytic reaction mixture into a micro-channel has been achieved considering the continuous regime properties. In this problem, the Knudsen number is considered smaller than 0.1 where the flow is in the continuous or slip regime. The governing equations are consisting of energy, mole fraction and catalytic conversion where the wall effects have been achieved from thermal and mass jump boundary conditions. The solution results at three different values of Knudsen number are compared with experimental data, and at all points, when the Knudsen number is equal to 0.01 the best validity by experimental data be available. The results of slip-jump solution, with maximum error of 2.54%, has a better validated experimental values than based modeling data without slip and jump condition, with maximum error of 26.6%. The greatest increase in fuel conversion occurs at low-level Reynolds number, with a value about 80.04%. Increasing thermal jump effect coefficient, normalized temperature reduces while with increase in mass jump effect coefficient, fuel conversion decreases and surface mole fraction increases.
Keywords
Micro-Channel
Continuous Regime
Non-Homogeneous Catalytic Reaction
Thermal and Mass Jump
Analytical Solution

Subjects

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Iranian Journal of Mechanical Engineering Transactions of ISME
Volume 20, Issue 4 - Serial Number 53
Fluid Mechanics and Heat Transfer
Winter 2019
Pages 6-25

  • Receive Date 20 October 2017
  • Revise Date 11 August 2018
  • Accept Date 10 March 2019