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Keywords: turbulent flow
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Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 11–14, 2010
Paper Number: PSIG-1002
... the head that is constant across the pipe. There are variations in the velocity and the temperature near the pipe wall, because the temperature of the environment is generally different from that of the fluid and the velocity of the wall is, of course, zero. For turbulent flow the eddy conductivity is...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, October 23–26, 2007
Paper Number: PSIG-0705
... states in the pipeline: Laminar flow very low velocities and the fluid moves in layers inside the pipe with friction between each of the layers. See Error! Reference source not found.. Partially turbulent flow the velocity profile in bullet shaped with the highest velocity in the center of the...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, November 7–9, 2005
Paper Number: PSIG-0505
... turbulent flow found by Nikuradse. These two formulas have been widely employed for almost one century. However, the transition region where the roughness elements start to protrude significantly into the viscous sublayer bears significant uncertainty. Most of the pipelines operated by Gassco are in the...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, October 15–17, 2003
Paper Number: PSIG-0302
... , then the one-dimensional approximation could be kept here, but it doesn't. For laminar pipe flow, the velocity profile changes quadratically with radius between a maximum value at the center of the pipe and zero at the wall; in turbulent flow, there are complicated turbulent eddies but the average...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, October 15–17, 2003
Paper Number: PSIG-03B3
... loss. It works in turbulent flows only and is influencing the structure of the turbulent boundary layer. Field tests have shown that DRA in oil transmission lines tend to have better efficiency the lower the density, or the viscosity. Gas in dense phase, i.e. the pressure is higher than the...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, October 20–22, 1999
Paper Number: PSIG-9911
...; a solution algorithm for the two-phase approach is also given. 5.1 SINGLE PHASE SOLUTION APPROACH For gas transmission pipelines, two flow regimes are generally encountered: partially turbulent flow (smooth pipe law) and fully turbulent flow (rough pipe law). Pipelines operating in the partially...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, October 27–28, 1983
Paper Number: PSIG-8303
... flow equation midstream oil & gas panhandle pipeline efficiency turbulent flow pipeline simulation interest group downstream pressure piping simulation pipeline leak detection upstream pressure general flow equation measurement and control reynolds number production monitoring...

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