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Particle removal by two-phase filtration flow from a porous medium under wave action

A.I. Nikiforov, R.V. Sadovnikov

Original article

DOI https://doi.org/10.18599/grs.2021.4.7

58-64
rus.
eng.

open access

Under a Creative Commons license
The paper discusses the influence of wave action on the process of detachment and removal of particles from a porous body by a two-phase filtration flow. When modeling this process, the problem of the influence of the wave field on the force under the action of which the particles are detached from the pore walls is solved. For the first time, a pore-size distribution function is used for its solution. An expression for the critical flow velocity under wave action has been obtained. Critical frequency value of wave action depends on the capillary radius and the smaller the capillary radius is, the higher frequency is needed to enhance the effect of the action. At higher frequency of oscillation the peak of maximum change in the thickness of the sedimentary layer is shifted towards the pores of small radius. To maintain the influence of the wave field on the filtration parameters of the porous medium, the wave action should be carried out at a dynamically changing frequency range to increase the coverage of the effect of as many pores as possible. It is shown that particle removal during wave action increases due to the action of inertial forces, which reduce the influence of forces holding the particles on the pore surface.
 
wave action, porous medium, two-phase filtration, control volume method
 
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Anatoly I. Nikiforov
Institute of Mechanics and Engineering, FRC Kazan Scientific Center of the Russian Academy of Sciences
2/31, Lobachevsky st., Kazan, 420111, Russian Federation
 
Roman V. Sadovnikov
Institute of Mechanics and Engineering, FRC Kazan Scientific Center of the Russian Academy of Sciences
2/31, Lobachevsky st., Kazan, 420111, Russian Federation
 

For citation:

 Nikiforov A.I., Sadovnikov R.V. (2021). Particle removal by two-phase filtration flow from a porous medium under wave action. Georesursy = Georesources, 23(4), pp. 58–64. DOI: https://doi.org/10.18599/grs.2021.4.7