A fractional differential equation for a MEMS viscometer used in the oil industry. [In special issue: Analysis and Numerical Approximation of Singular Problems]


Fitt, A.D., Goodwin, A.R.H., Ronaldson, K.A. and Wakeham, W.A. (2009) A fractional differential equation for a MEMS viscometer used in the oil industry. [In special issue: Analysis and Numerical Approximation of Singular Problems] Journal of Computational and Applied Mathematics, 229, (2), pp. 373-381. (doi:10.1016/j.cam.2008.04.018).

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Description/Abstract

A mathematical model is developed for a micro-electro-mechanical system (MEMS) instrument that has been designed primarily to measure the viscosity of fluids that are encountered during oil well exploration. It is shown that, in one mode of operation, the displacement of the device satisfies a fractional differential equation (FDE). The theory of FDEs is used to solve the governing equation in closed form and numerical solutions are also determined using a simple but efficient central difference scheme. It is shown how knowledge of the exact and numerical solutions enables the design of the device to be optimised. It is also shown that the numerical scheme may be extended to encompass the case of a nonlinear spring, where the resulting FDE is nonlinear.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.cam.2008.04.018
ISSNs: 0377-0427 (print)
Keywords: fractional differential equation, viscometer, densimeter, mems device
Subjects:

ePrint ID: 66696
Date :
Date Event
19 May 2007Submitted
15 July 2009Published
Date Deposited: 10 Jul 2009
Last Modified: 18 Apr 2017 21:31
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/66696

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