publication . Conference object . 2012

Implementing unsteady friction in pressure-time measurements

Jonsson, Pontus; Ramdal, Jorgen; Cervantes, Michel; Nielsen, Torbjørn Kristian;
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  • Published: 01 Jan 2012
  • Country: Sweden
Abstract
Laboratory measurements using the pressure‐time method showed a velocity or Reynolds number dependent error of the flow estimate. It was suspected that the quasi steady friction formulation of the method was the cause. This was investigated, and it was proved that implementing a model for unsteady friction into the calculations improved the result. This paper presents the process of this investigation, and proposes a new method for treatment of the friction term in the pressure‐time method.
Subjects
arXiv: Physics::Fluid Dynamics
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