In-situ particle sizing at millimeter scale from electrochemical noise: simulation and experiments. (20th October 2015)

• Record Type: Journal Article
• Authors: Yakdi, N.; Huet, F.; Ngo, K.
• Is Part Of: Electrochimica acta. Volume 180(2015)
• Page Start: 1050
• Page End: 1058
• Publication Date: 2015-10-20
• Subjects: Particle sizing techniques -- Two-phase systems -- Electrochemical noise -- Electrolyte resistance; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.09.051
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Over the last few years, particle sizing techniques in multiphase flows based on optical technologies emerged as standard tools but the main disadvantage of these techniques is their dependence on the visibility of the measurement volume and on the focal distance. Thus, it is important to promote alternative techniques for particle sizing, and, moreover, able to work in hostile environment. This paper presents a single-particle sizing technique at a millimeter scale based on the measurement of the variation of the electrolyte resistance (ER) due to the passage of an insulating sphere between two electrodes immerged in a conductive solution. A theoretical model was proposed to determine the influence of the electrode size, the interelectrode distance, the size and the position of the sphere, on the electrolyte resistance. Experimental variations of ER due to the passage of spheres and measured by using a home-made electronic device are also presented in this paper. The excellent agreement obtained between the theoretical and experimental results allows validation of both model and experimental measurements. In addition, the technique was shown to be able to perform accurate measurements of the velocity of a ball falling in a liquid.