Electrical capacitance tomography monitoring of nonstationary gas-solid flow in a horizontal duct

K. Karhunen , L. Heikkinen, M. Vauhkonen

Department of Applied physics, University of Eastern Finland, P.O.Box 1627, FIN-70211 Kuopio, Finland

Abstract

In this paper, we consider a novel method for monitoring of nonstationary gas-solid flow in a two dimensional channel using electrical capacitance tomography (ECT). The method is based on state estimation technique in which the time varying nature of the target can be taken into account. The information about the gas-solid interactions is incorporated into the state estimation through process evolution model that is constructed on the basis of two-phase flow model. The numerical simulations indicate that solid volume fraction and mass flow rate can be reconstructed quite accurately from the ECT measurements using the proposed method.

Keywords: electrical capacitance tomography, two-phase flow, inverse problems, time varying model, state estimation