Simulations of stratified and slug flows

Code

J2-6564 (C) - included in ARIS records

Head

PhD Iztok Tiselj

Period

7/1/2004 - 6/30/2007

Range in 2007

0.47 FTE

Science

Engineering sciences and technologies (7)
Other (2)

Reseacher status

Researcher (7)
Junior expert or technical associate (2)

Education

Doctor's degree (6)
Other (3)

Sex

Woman (1)
Man (8)

Status

Employed at RO and RRD (8)
No data on employment in RO (1)

No. of publications

0 (1)
1–9 (1)
10–99 (3)
100–999 (4)

Projects / Programmes source: ARIS

source: ARIS

Simulations of stratified and slug flows

Research activity

Code	Science	Field	Subfield
2.13.00	Engineering sciences and technologies	Process engineering

Code	Science	Field
T160	Technological sciences	Nuclear engineering and technology

Keywords

stratified two-phase flow, slug flow, interface tracking model, two-fluid model

Evaluation (rules)

source: COBISS

Evaluation of bibliographic research performance indicators according to ARIS methodology

Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases

source: WoS

source: Scopus

source: COBISS

Researchers (9)

no.	Code	Name and surname	Research area	Role	Period	No. of publicationsNo. of publications
1.	21538	PhD Robert Bergant	Energy engineering	Junior researcher	2004 - 2005	42
2.	23083	PhD Janez Gale	Process engineering	Junior researcher	2004 - 2007	75
3.	05570	PhD Ivo Kljenak	Energy engineering	Researcher	2004 - 2007	466
4.	24075	Tanja Klopčič		Technical associate	2004 - 2007	6
5.	14572	PhD Matjaž Leskovar	Energy engineering	Researcher	2004 - 2007	435
6.	21181	Zoran Petrič	Energy engineering	Researcher	2004 - 2007	15
7.	08661	PhD Andrej Prošek	Energy engineering	Researcher	2004 - 2007	600
8.	19725	Andrej Sušnik		Technical associate	2004 - 2007	0
9.	12057	PhD Iztok Tiselj	Energy engineering	Head	2004 - 2007	469

Organisations (1)

no.	Code	Research organisation	City	Registration number	No. of publicationsNo. of publications
1.	0106	Jožef Stefan Institute	Ljubljana	5051606000	90,753

Abstract

Three-dimensional simulations of horizontal stratified and horizontal slug flow in the pipes are foreseen. Simulations will be performed with "in-house" computer codes and with a computer code CFX. Numerical method that enables explicit tracking of the inter-phase surface - Volume-Of-Fluid - will be used. Interface between two fluids in horizontal stratified flow is stable as long as the difference between the bulk velocities of the lighter and heavier phase remains sufficiently small. As the relative velocity is increasing, the critical value is reached, where the surface becomes unstable (Kelvin-Helmholtz instability). Growth of the surface waves changes the flow into "horizontal slug flow regime". Our simulations will describe horizontal stratified and horizontal slug flow regimes and transition between both flow regimes. Goals of the simulations are simplified models, which can be used as closure relations in less accurate two-fluid models of two-phase flows: - simplified model of inter-phase friction in horizontal stratified flow, - simplified model of transition between the horizontal stratified and horizontal slug flow, - and simplified models of inter-phase friction in horizontal slug flow. In the second phase of the project we plan to simulate the horizontal stratified flow, the horizontal slug flow, and transition between both flow regimes in the presence of the condensation or vaporization. The goals of the simulations are again simplified models of the inter-phase exchange of mass, momentum and heat: - models of inter-phase friction in horizontal stratified and horizontal slug flow, - models of inter-phase heat and mass transfer in horizontal stratified and horizontal slug flow, - model of transition between both flow regimes in the presence of the inter-phase mass transfer.