Slug Tracking Simulation of Severe Slugging Experiments

Authors: Tor Kindsbekken Kjeldby, Ruud Henkes, Ole Jørgen Nydal

Abstract:

Experimental data from an atmospheric air/water terrain slugging case has been made available by the Shell Amsterdam research center, and has been subject to numerical simulation and comparison with a one-dimensional two-phase slug tracking simulator under development at the Norwegian University of Science and Technology. The code is based on tracking of liquid slugs in pipelines by use of a Lagrangian grid formulation implemented in Cµ by use of object oriented techniques. An existing hybrid spatial discretization scheme is tested, in which the stratified regions are modelled by the two-fluid model. The slug regions are treated incompressible, thus requiring a single momentum balance over the whole slug. Upon comparison with the experimental data, the period of the simulated severe slugging cycle is observed to be sensitive to slug generation in the horizontal parts of the system. Two different slug initiation methods have been tested with the slug tracking code, and grid dependency has been investigated.

Keywords: Hydrodynamic initiation, slug tracking, terrain slugging, two-fluid model, two-phase flow.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1333488

References:

[1] D. Bestion, The physical closure laws in the cathare code, Nuclear Engineering and Design 124 (1990) 229-245.
[2] RELAP5/MOD3.3 CODE MANUAL VOLUME IV: MODELS AND CORRELATIONS.
[3] K. Bendiksen, D. Malnes, R. Moe, S. Nuland, The dynamic two-fluid model olga: Theory and application, SPE Production Engineering (1991) 171-180.
[4] R. Issa, M. Kempf, Simulation of slug flow in horizontal and nearly horizontal pipes with the two-fluid model, International Journal of Multiphase Flow 29 (2003) 69-95. doi:10.1016/S0301-9322(02)00127- 1.
[5] M. Bonizzi, P. Andreussi, S. Banerjee, Flow regime independent, high resolution multi-field modelling of near-horizontal gas-liquid flows in pipelines, International Journal of Multiphase Flow 35 (1) (2009) 34 - 46. doi:DOI: 10.1016/j.ijmultiphaseflow.2008.09.001.
[6] O. Nydal, S. Banerjee, Dynamic slug tracking simulations for gas-liquid flow in pipelines, Chem. Eng. Comm. 141-142 (1996) 13-39.
[7] A. D. Leebeeck, A roll wave and slug tracking scheme for gas-liquid pipe flow, Ph.D. thesis, NTNU (2010).
[8] F. Renault, A lagrangian slug capturing scheme for gas-liquid flows in pipes, Ph.D. thesis, NTNU (2007).
[9] P. Klebert, Slug tracking, PostDoc work (2004).
[10] J. Kj├©l┬░as, Plug propagation in multiphase pipelines: Modeling and small scale experiments, Ph.D. thesis, NTNU (2007).
[11] D. T. Dumitrescu, Str¨omung an einer luftblase im senkrechten rohr, Z. angew. Math. Mech 23 (3) (1943) 139-149.
[12] R. M. Davies, G. Taylor, The mechanics of large bubbles rising through extended liquids and through liquids in tubes, The Royal Society, series A, Mathematical and Physical sciences 200 (1062) (1950) 375-390.
[13] K. Bendiksen, An experimental investigation of the motion of long bubbles in inclined tubes, International Journal of Multiphase Flow 10 (4) (1984) 467 - 483. doi:DOI: 10.1016/0301-9322(84)90057-0.
[14] R. Moissis, P. Griffith, Entrance effects in a two-phase slug flow, Journal of Heat Transfer 84 (1962) 366-370.