Approaching a practice for transient CFD simulations of vortex flow meters
Licentiatavhandling, 2015

The usage of Large-Eddy Simulations (LES) in industrial applications makes it possible to study transient phenomena. The aim of this work is to find a reliable and accurate approach to transient studies of the internal flow field in a vortex flow meter. An initial investigation is made, based on simulation results from a cylinder in cross-flow, which is comparable to a vortex generating rod in a vortex flow meter. The dependency of turbulence models, spatial resolution and wall functions are investigated. Next, a fully synthetic boundary condition is developed to enable efficient and realistic inlet boundary conditions for applications where cyclic boundary conditions are not applicable, e.g. for vortex flow meters. Finally, the outcome from the initial study on the cylinder in cross-flow, and findings during the work with the inlet boundary condition, serves as a base for decision making when a vortex flow meter model is investigated. The results from a LES simulation and two Laser Doppler Velocimetry (LDV) measurements on a vortex flow meter model are compared. The results are evaluated in terms of centreline streamwise mean velocity, variance and vortex shedding frequencies.

laser doppler velocimetry

vortex flow meter model

synthetic inlet boundary condition

circular cylinder in cross-flow

large-eddy simulations

MA
Opponent: PhD. Ola Widlund, Strukturer och komponenter, SP Sveriges Tekniska Forskningsinstitut

Författare

Olof Penttinen

Chalmers, Tillämpad mekanik, Strömningslära

Large Eddy Simulation and Laser Doppler Velocimetry on a vortex flow meter model

Proceedings from International Symposium of Fluid Flow Measurements,; Vol. 2015(2015)

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

A fully synthetic turbulent boundary condition with a homogeneous vortex distribution

Computer Physics Communications,; Vol. 190(2015)p. 23-32

Artikel i vetenskaplig tidskrift

Styrkeområden

Energi

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

Ämneskategorier

Strömningsmekanik och akustik

Technical report - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden: 2015:17

MA

Opponent: PhD. Ola Widlund, Strukturer och komponenter, SP Sveriges Tekniska Forskningsinstitut