Berdnyk O.M.

The Study of the Structure of Laminar Currents in Recirculating Channels with Developed Surface

In order to research influence of parameters of the developed surface on structure of a laminar current of viscous incompressible liquid in ring channels the computing model, and algorithm of creation of profiles of speed has been offered. This case deals with a homogeneous layer of obstacles – cylindrical protrusions, distance between which ensures the absence of hydrodynamics interactions. Numerical calculations allowed analyzing dependence of the maximum and average speeds of a stream from density of ledges on a surface of the channel and from their height.

Fully Developed Viscous Flow through Rectangular Pipe with an Easily Penetrable Roughness on Walls

The aim of this paper is to formulate a problem of laminar viscous flow through an endless rectangular pipe with an easily penetrable roughness (EPR) on walls. We solve this problem by utilizing the MATLAB mathematical package. Moreover, we obtain the numeric data on the roughness depth and density. Our research results are tested on some borderline cases that result in the given problems.