Residence Time Distributions for Turbulent, Critical, and Laminar Pipe Flow
نویسندگان
چکیده
منابع مشابه
Distinct large-scale turbulent-laminar states in transitional pipe flow.
When fluid flows through a channel, pipe, or duct, there are two basic forms of motion: smooth laminar motion and complex turbulent motion. The discontinuous transition between these states is a fundamental problem that has been studied for more than 100 yr. What has received far less attention is the large-scale nature of the turbulent flows near transition once they are established. We have c...
متن کاملA critical-layer framework for turbulent pipe flow
A model-based description of the scaling and radial location of turbulent fluctuations in turbulent pipe flow is presented and used to illuminate the scaling behaviour of the very large scale motions. The model is derived by treating the nonlinearity in the perturbation equation (involving the Reynolds stress) as an unknown forcing, yielding a linear relationship between the velocity field resp...
متن کاملExperiment and simulation of laminar and turbulent ferrofluid pipe flow in an oscillating magnetic field.
Laminar and turbulent pipe flow of a ferrofluid with an imposed linearly polarized, oscillating, magnetic field is examined here. Experimental results show a fractional pressure drop dependence on flow rate, magnetic field strength, and oscillation frequency. Calculations are presented, which show that ferrofluid theory can explain the flow phenomena in laminar and turbulent pipe flow. The mode...
متن کاملLaminar and turbulent comparisons for channel flow and flow control
IVAN MARUSIC, D. D. JOSEPH and KRISHNAN MAHESH Journal of Fluid Mechanics / Volume 570 / January 2007, pp 467 477 DOI: 10.1017/S0022112006003247, Published online: 03 January 2007 Link to this article: http://journals.cambridge.org/abstract_S0022112006003247 How to cite this article: IVAN MARUSIC, D. D. JOSEPH and KRISHNAN MAHESH (2007). Laminar and turbulent comparisons for channel flow and ...
متن کاملManipulating Flow Structures in Turbulent Pipe Flow
Two different tools, the non-empirical resolvent analysis and the data-based dynamic mode decomposition, are employed to assess the changes induced by transpiration in the dynamics of a turbulent pipe flow. The focus is on very large-scale motions. Both analyses permit the observation of streamwise waviness in the large flow structures and how the transpiration can inhibit fluctuation in locali...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Hydraulic Engineering
سال: 2016
ISSN: 0733-9429,1943-7900
DOI: 10.1061/(asce)hy.1943-7900.0001146