TY - GEN
T1 - AUTO-REGRESSIVE MODELING FOR FLOW PATTERN CHARACTERISATION
AU - Legius, Erik J.W.M.
AU - Mudde, Robert F.
AU - Akker, Harry E.A.Van Den
N1 - Publisher Copyright:
© 1998 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 1998
Y1 - 1998
N2 - The two-phase flow of air/water has been investigated in two 'complex' geometries: a vertical pipe with contraction and a line/riser system with a bend. Pressure recordings and optical fiber measurements have been analysed using Auto-Regressive modeling. This type of modeling describes the data as a linear combination of previous data. It is discussed how the transition from one flow regime to an other is influenced by the flow obstructions. The Auto-Regressive modeling provides a quantitative measure of the similarity between two flow realisations. It is found that identification of flow regimes based on this measure coincides with visual observation. With the Auto-Regressive technique the width of the transition could also be quantified. Furthermore it is shown, that the upward bend stabilises the slug flow in the vertical part downstream of the bend: the transition towards churn flow is postponed.
AB - The two-phase flow of air/water has been investigated in two 'complex' geometries: a vertical pipe with contraction and a line/riser system with a bend. Pressure recordings and optical fiber measurements have been analysed using Auto-Regressive modeling. This type of modeling describes the data as a linear combination of previous data. It is discussed how the transition from one flow regime to an other is influenced by the flow obstructions. The Auto-Regressive modeling provides a quantitative measure of the similarity between two flow realisations. It is found that identification of flow regimes based on this measure coincides with visual observation. With the Auto-Regressive technique the width of the transition could also be quantified. Furthermore it is shown, that the upward bend stabilises the slug flow in the vertical part downstream of the bend: the transition towards churn flow is postponed.
UR - http://www.scopus.com/inward/record.url?scp=85124602057&partnerID=8YFLogxK
U2 - 10.1115/IMECE1998-0750
DO - 10.1115/IMECE1998-0750
M3 - Conference contribution
AN - SCOPUS:85124602057
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 323
EP - 333
BT - Heat Transfer
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 1998 International Mechanical Engineering Congress and Exposition, IMECE 1998
Y2 - 15 November 1998 through 20 November 1998
ER -