The Fascinating Challengess of Bluff-body Aerodynamics

Published on 15 October 2020
The Fascinating Challengess of Bluff-body Aerodynamics

After the great success of our recent collarboartion with ANIV, our Italian cousins, we are very happy to promote their next online event.  It will no doubt be of interest to many in our community.

The Fascinating Challenges of Bluff-Body Aerodynamics

Speaker: Guido Buresti, Universities of Pisa and Genoa

Time: Thursday 29th October 2000, 9am UK (10am CEST)

Registration: If you are not an ANIV-G member please register by sending us a message to
giovaniingegnerivento@gmail.com specifying your given and family names from an
address linked to your Microsoft Teams account

Abstract

The main objective of the lecture is trying to explain why bluff-body aerodynamics is a complex and intriguing
field from both the research and engineering points of view. We start with a definition of aerodynamic and bluff
bodies and a characterization of their differences as regards the type and magnitude of the aerodynamic loads to
which they are subjected and the availability of methods for their prediction. The connection between
perturbation energy and aerodynamic drag will be discussed, and the importance of the amount and
organization of the vorticity shed in a body wake will be emphasized. Alternate vortex shedding from cylinders
and its relationship with the aerodynamic loads will then be analysed and some methods to modify its features
or inhibit its occurrence will be described. Subsequently, techniques for flow control, particularly as regards drag
reduction, will be exemplified and discussed. The possibility of non-obvious behaviour of the flow field and of the
aerodynamic loads as a function of the variation of certain geometrical parameters characterizing a given
configuration will also be illustrated. Aeroelastic phenomena typical of bluff bodies, such as galloping and vortexshedding-
induced oscillations, will then be briefly considered, and some information will be given as regards the
availability of methods to predict their occurrence and intensity or to avoid them. Finally, selected open research
subjects will be outlined.

Short CV

Guido Buresti is an aeronautical engineer and has worked for more than 40 years at the Department of
Aerospace Engineering (now Department of Civil and Industrial Engineering) of the University of Pisa, teaching
different courses related to aerodynamics and fluid dynamics. His research activity was devoted to applied
aerodynamics, and was mainly experimental but also theoretical and numerical, and is documented in more than
150 scientific works. Bluff-body aerodynamics, together with its applications to different engineering fields, is
perhaps his main research topic. He has also given contributions to the development of experimental
measurement procedures and of methods for the time-frequency analysis of signals. He has been responsible of
many research contracts financed by public and private institutions, and has carried out a significant activity as
associate editor and reviewer for several international scientific journals. He is the author of the textbook
"Elements of Fluid Dynamics" (Imperial College Press, 2012), and has been a member of the Boards of Directors
of ANIV from 1988 to 2007 and of the Von Karman Institute for Fluid Dynamics from 1995 to 2014. He is now
retired but continues to be involved in research activities concerning different engineering applications of fluid
dynamics; currently, he collaborates with the University of Genoa on research subjects related to the effect of
thunderstorms on civil structures.