A new approach in determine of the coefficient of variation (COV) for internal rapid mixing using a space filling circle grid fractal for improving a combustion burning limits

Manshoor, Bukhari and Salleh, Hamidon and Khalid, Amir and Abdullah, Aslam and Zakaria, Hanis and Othman, Mohd Fahmi (2014) A new approach in determine of the coefficient of variation (COV) for internal rapid mixing using a space filling circle grid fractal for improving a combustion burning limits. Other thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

The applications of the static mixers are widely applied in many industries to obtain the desired type of mixing. In this context, to perform the mixing process should have two different fluids that also have different properties which will combines it in a single equipment to make an another fluid. The main objective of this research study is to propose a new approach of fractal concept (circle grid perforated plate) for internal rapid mixing by determining the coefficient of variation (COV). This study was implemented by fully numerical simulations. The simulations of mixing fluid were carried out with the help of commercial computational fluid dynamic (CFD) package ANSYS CFX 14.0 sohare. The simulation was done primarily in cylindrical pipe with insertions of circle grid perforated plate with porosity of 50% and 75%. Three levels of laminar flow have been chosen to result in Reynolds numbers (Re) equal to 100, 200 and 400. The effectiveness of circle grid perforated plate static mixer has been evaluated by comparing the homogeneity level of mixing fluids to the Kenics static mixer that readily available in industries applications. Based on the research findings, the COV value of circle grid perforated plate with 75% porosity at Reynolds number 400 is 0.00427 which is almost completely mixed for mixing fluid and the pressure drop value is 6.02 1Wa. In term of manufacturing cost and energy loss due to static mixer, definitely this new approach of 75% porosity circle grid perforated plate is better design compared to the Kenics static mixer because of lower number of inserts and simpler design of static mixer to produce.

Item Type:Thesis (Other)
Subjects:T Technology > TP Chemical technology > TP155-156 Chemical engineering
ID Code:6905
Deposited By:Normajihan Abd. Rahman
Deposited On:12 May 2015 15:41
Last Modified:12 May 2015 15:41

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