%0 Journal Article
%T The Discrete Vortex Method for estimating how surface roughness affects aerodynamic drag acting on a long cylinder exposed to wind
%A Nowicki, Tomasz
%J Technical Transactions
%V 2015
%R 10.4467/2353737XCT.15.129.4166
%N Budownictwo Zeszyt 2-B (12) 2015
%P 127-144
%K wind engineering, discrete vortex method, surface roughness, aerodynamic force, aerodynamic drag
%@ 0011-4561
%D 2015
%U https://ejournals.eu/en/journal/czasopismo-techniczne/article/the-discrete-vortex-method-for-estimating-how-surface-roughness-affects-aerodynamic-drag-acting-on-a-long-cylinder-exposed-to-wind
%X 
	This paper focuses on the aerodynamic drag force that acts on a long cylinder standing up to aerodynamic wind in the critical regime of the fluid flow. The core problem addressed here is how surface roughness of a high level and further increase of that level affects the drag. The research is based on computer simulations using the Discrete Vortex Method. A meshless version of the method was applied in order to let the boundary layer form freely in the way of a direct computer simulation. Fundamental ideas behind the Discrete Vortex Method, the original research program and the obtained results are presented. The main conclusion is that a small level of surface roughness may be neglected in engineering estimations.