Experimental modeling of Electric kinetic barrier (EKB) in Porous Medium, Explain its numerical solution methods and analysis of the relations in the Hydraulic-Electric‌ coupled flow

Document Type : Research


1 Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

2 Assistant Professor, Department of Civil Engineering Civil, Hamedan Branch, Islamic Azad University, Hamadan, Iran

3 Assistant Professor, Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

4 Assistant Professor, Department of Water Engineering, Buali Sina University, Hamedan, Iran


This research project is aimed at developing the theoretical knowledge of hydraulic-electric coupled flows and its results can be used to zero the flow in a porous medium such as seepage in engineering barriers made with clay and And also the definition of a new concept called electrokinetic engineering barrier. Also, the simulation of the electrokinetic barrier process was carried out using the finite difference method, and the methods of solving the numerical model of this process were investigated. Finally, the Forward Difference Approximation method was proposed due to more accuracy for coding in the MATLAB software. Laboratory studies was provided by an innovative physical model. To achieve this, several experiments were performed on kaolinite soil with a specific gravity of 1.3 gr/cm3, 1.315 gr/cm3, and 1.33 gr/cm3 under different electric potentials and the results of the experiments. They were compared with each other. The results showed that  ability of the electrical gradient to generate electro-osmotic flow to overcome the hydraulic flow and create an electrokinetic barrier is affected by the input voltage as well as the dry specific gravity of the samples in the cell and with increasing them, this ability increases so that in the denser sample the electrical gradients applied to the cell were able to stop the hydraulic flow in the higher hydraulic heads while in the less compacted samples the hydraulic heads were stopped at lower values.


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