TY - JOUR
T1 - Numerical modelling of unsteady turbulent flow in smooth-walled pipes
AU - Johnston, D Nigel
PY - 2011/7
Y1 - 2011/7
N2 - An efficient numerical model for turbulent friction has been developed for smooth-walled pipe flow. The aim was to develop a new approach to the numerical modelling, eliminating some important approximations and sources of error, such that the method can be applied reliably under a wide range of conditions. A simple two-region model of effective viscosity is used. For short timescales the turbulence level and effective viscosity distribution are ‘frozen’ in time. The velocity profile is determined numerically for a range of frequencies and viscosity distributions, and this is used to determine the frequency-dependent friction. This is then approximated using simple weighing functions.
AB - An efficient numerical model for turbulent friction has been developed for smooth-walled pipe flow. The aim was to develop a new approach to the numerical modelling, eliminating some important approximations and sources of error, such that the method can be applied reliably under a wide range of conditions. A simple two-region model of effective viscosity is used. For short timescales the turbulence level and effective viscosity distribution are ‘frozen’ in time. The velocity profile is determined numerically for a range of frequencies and viscosity distributions, and this is used to determine the frequency-dependent friction. This is then approximated using simple weighing functions.
UR - http://www.scopus.com/inward/record.url?scp=79960400174&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1177/0954406211400796
U2 - 10.1177/0954406211400796
DO - 10.1177/0954406211400796
M3 - Article
SN - 0954-4062
VL - 225
SP - 1601
EP - 1615
JO - Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
JF - Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
IS - 7
ER -