Gravity effects on mixing with magnetic micro-convection in microfluidics G. Kitenbergs, A. Tatuļčenkovs, L. Puķina and A. Cēbers Eur. Phys. J. E, 41 11 (2018) 138 Published online: 26 November 2018 DOI: 10.1140/epje/i2018-11749-9