https://doi.org/10.1051/epjconf/201715900014
Lift and Drag Forces for a Sphere on a Flat Wall in Non-Newtonian Shear Flow
1
Scientist, Novosibirsk Technology Center of Baker Hughes Incorporated, 630090, Kutateladze 4a, Novosibirsk, Russia
2
Mechanical Engineer, Celle Technology Center of Baker Hughes Incorporated, Baker-Hughes-Strasse 1, Celle, Niedersachsen 29221, Germany
* Corresponding author: yaroslav.ignatenko@gmail.com
Published online: 25 October 2017
Parametrical study of perfect steady rolling and steady state freely motion of spherical particle on the wall in shear flow of non-Newtonian fluid was carried out. In the case of perfect rolling the jumps of forces acting on a sphere in the moment of changing particle velocity from zero to positive were observed. Non-Newtonian properties of fluid lead to decreasing of drag force coefficient for low particle's velocity and to opposite effect for high velocity relative to Newtonian fluid. There is no such significant effect for a lift force coefficient. Steady state particle's velocity (Fd(Vpss)=0) increases for non-Newtonian fluid for both considered types of motion. Steady state particle's velocity and lift force coefficient are lower for the case of freely particle motion. Steady state rotational velocity decreases for non-Newtonian fluid.
© The authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
