New Zealand Journal of Agricultural Research abstracts

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Particle swarm optimisation based inversion and numerical simulation of permeability of oilseed cakes

Xiao Zheng^1,*

Guoxiang Lin¹

Zhi Li²

Jingzhou Wang¹

¹Department of Mechanical Engineering
Wuhan Polytechnic University
Wuhan 430023, China

²Department of Electrical and Information Engineering
Wuhan Polytechnic University
Wuhan 430023, China

^*Author for correspondence:
zhengxiao580405@163.com

Abstract    Considering the variations of porosity and permeability of rapeseed cake and dehulled rapeseed cake during pressing, a one-dimensional partial differential equation for flow of fluids through porous media of rapeseed cake and dehulled rapeseed cake was developed based upon the theory of fluid-solid interaction, in which the cake was deformable and the permeability was variable. An analytic solution for the problem of fluid-solid interaction of one-dimensional steady flow of fluids through porous media was proposed. Permeability parameters of rapeseed cake and dehulled rapeseed cake were identified by using improved particle swarm optimisation. Numerical simulations of seepage rates, distribution of pore pressure and permeability in the cake were made. The results indicated that the distribution of pore pressure and permeability in the cake were nonlinear, an exponential function simulated the relationship between permeability and effective stress well, and the permeability of rapeseed cake was greater than that of dehulled rapeseed cake.

Keywords    inversion; numerical simulation; particle swarm optimisation; permeability; oilseed cakes

A07071; Online publication date 17 December 2007; Received and accepted 10 August 2007

New Zealand Journal of Agricultural Research, 2007, Vol. 50: 627–634
0028–8233/07/5005–00627    © The Royal Society of New Zealand 2007

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