Calculation of the Streaming Potential Near a Rotating Disk with Rotational Elliptic Coordinates

F.S. Lameiras* and E.H.M. Nunes

Centro de Desenvolvimento da Tecnologia Nuclear, Comissão Nacional de Energia Nuclear, Av. Antônio Carlos, 6.627, 31.270-901 Belo Horizonte, Minas Gerais, Brazil

 

Received 23^rd January 2008; accepted 10^th March 2008

 

Abstract

The calculation with rotational elliptic coordinates of the streaming potential in the vicinity of a disk-shaped sample rotating in an electrolytic solution is presented. The measurement of this streaming potential is used to determine the zeta potential of planar surfaces. Rotational elliptic coordinates are favored in relation to integral transform methods because only simple mathematical methods are employed to explain the theory of this technique.

 

Keywords: zeta potential, planar surfaces, rotating disk, streaming potential, rotational elliptic coordinates.

 

 

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* Corresponding author. E-mail address: fernando.lameiras@pq.cnpq.br