Flow Profile Around Bluff Body

Abstract

This paper presents the results of an analytical study on local scour around bluff bodies. An equation has been developed which allowed the velocity distribution of the vertical component of velocity induced by the presence of a body to be predicted. The equation, equation (16) was obtained by re-organising known facts and incorporating them in a new fashion e.g. the logarithmic velocity profile was modified to include turbulence effect. Much of this has been done before but it is believed that this is the first time that the particular combination of turbalence effects, roughness effects, etc has been presented. Equation ( 16) is a modification of equation (16) in reference (7).The predicted vertical velocity distributions have been compared with analytically obtained data from previous investigations. The results of the comparison are encouraging but unfortunately not conclusive due to the lack of sufficient reliable experimental data.