Center for MHD Studies;
Ben-Gurion University of the Negev;
Beer-Sheva;
Israel;
Department of Mechanical Engineering;
Ben-Gurion University of the Negev;
Beer-Sheva;
Israel;
Mahyd and Co;
Tallinn;
Estonia;
vertical; coordinate; system; helical; channel; pitch; angle; external; friction; model; electromagnetic; body; force; flow; velocity.;