Tucore Drb - Flow Pattern May 2015 - Tba

May, 2015

Estimation of Confidence Level in Flow Pattern Predictions, Phase 3

Progress Report & Schedule PI’s: Eduardo Pereyra, Tayfun Aydin

Chevron Champion: Gene Kouba, Carlos Avila

TU-CORE

Estimation of Confidence Level in Flow Pattern Predictions, Phase 3

Expand the confidence level methodology to quantify the confidence in flow pattern predictions to Interfacial wave patterns for gas/liquid systems Oil-Water flow

Business Intersection & Impact Impacts all flow pattern dependent multiphase flow predictions

that are near transition regions (GVLA & Jansz) Used to confirm piping configuration for flow conditioning

upstream of TCO PBF 3 phase separator Corrosion impact owing to water distribution in pipelines

Tengiz (High CO2 content)

Technology Development Stage

Timeline

Enabling/ Enhancing

2013 2014 2015 2016 2017 2018 2019 Target Deployment and Year

Enhancing 1 2 3  4 5 6 2022 (depending on opportunity)

1Initiation 

2 Concept

3 Proof of Concept 

4 Integration

5Demonstration

6 Prototype 

7Pre-production 

8 Production

9 Field Proven

Project Budget Status

Estimation of Confidence Level in Flow Pattern Predictions, Phase 3

Total funds received (since the beginning of the project)

[$]

Funds carried over from 2014 $1,897

2015 Budget $105,000

Total 2015 funds available $106,897

YTD expenses (including encumbrances) $86,207

Estimated EOY spend $106,000

Estimated funds carried over from 2015 $897

2016 Budget $120,000

Total 2016 funds available

Motivation / Gas-Liquid Wave Characteristics

Stratified flow has been considered as a unique flow pattern

For stratified region, different kinds of waves are formed at the interface

These waves affect the pressure drop and liquid holdup

Figure 1. Flow pattern schematic after Andritsos and Hanratty (1986).

Chen et al. (1997)Increasing v

Sg

2-D wave flow

3-D wave flow

Roll wave flow

Entrained droplet flow

Motivation / Gas-Liquid Wave Characteristics

Wave patterns affect two-phase flow features

0 2 4 6 8 10 12 140

0.005

0.01

0.015

0.02

0.025

0.03

0.035

HL , [%]

fI

Roll Waves 3D Waves

Interfacial friction factor

Motivation / Oil-Water Flow

0.01

0.1

1

10

0.01 0.1 1 10v SO , m/s

v SW,

m/s

Experimental data. Trallero, 1995.

DISPERSION OF OIL IN WATER (DO/W)

STRATIFIED (ST)

Oil

Water

DISPERSION OF OIL IN WATER AND WATER LAYER

(DO/W&W)

STRATIFIED WITH MIXING INTERFACE (ST&MI)

DISPERSION OF WATER IN OIL

(DW/O)

DISPERSION OF OIL IN WATER & WATER IN OIL (DO/W&W/O)

Better understanding of the oil/water flow pattern can be used to develop guidelines to ensure water

dispersion in oil phase

Deliverables / Results since last DRB

Gas-Liquid two phase flowConfidence level prediction for gas liquid flow was finalizedWorkshop presented to disseminate the technology and get

feed back form ETC potential users

Wave PatternsLiterature Survey (%50)VBA tool to predict wave patterns (%50)

Oil-Water flowLiterature Survey (%60)Database (%60)VBA tool to analyze data from literature (%80)Methodology to characterize confidence level in oil/water flow

pattern prediction (%0)

Estimation of Confidence Level in Flow Pattern Predictions, Phase 3

Estimation of Confidence Level in Flow Pattern Predictions, Phase 3

Sample prediction for wave patterns

1 10 100

0.001

0.010

0.100

Smooth 2D Waves3D Waves STR Smooth to 2D

vSg [m/s]

vSL

[m

/s]

Data: Tzotzi and Andritsos (2013)1-in. ID pipe, Air/Water

Transition to Non-Stratified Flow (KH-inviscid criteria)

Estimation of Confidence Level in Flow Pattern Predictions, Phase 3

Oil-Water flow database:(4600 data points)

Challenges / SolutionFlow pattern definitions differ within

researchers / Compile all definitionsLack of clarity in dispersed flow patterns /

Use inversion point

Sample Oil/Water Flow Pattern map

Estimation of Confidence Level in Flow Pattern Predictions, Phase 3

0.01 0.1 1

0.01

0.1

1

ST ST & MI

vSO [m/s]

vSW

[m/s]

(Trallero, 1995)

Planned Deliverables for next DRBGas-Liquid wave patterns

Literature Survey (Remaining %50)VBA tool (Remaining %50)Database (Remaining %100)Evaluation of VBA tool based on

database (Remaining %100)

Estimation of Confidence Level in Flow Pattern Predictions, Phase 3

Planned Deliverables for next DRBOil-Water flow

Database Literature Survey VBA tool to analyze data (Remaining %20)Methodology to characterize

confidence level in oil/water flow pattern prediction

Estimation of Confidence Level in Flow Pattern Predictions, Phase 3

2016 Budget Options

1. Minimum Cost ($70K)

1. Just include student costs (Ninh) and minimum supervision to finish current activities trough December 2016

1. Finalize data collection

2. Implement proposed methodology for oil/water flow pattern uncertainties

2. Improved Deliverables(+$40K)

1. Participation of research associate and assistant professor to:

1. Improve the methodology for oil/water flow pattern uncertainties

2. Verification and further development of the proposed computer code

3. Organize a work shop for technology transfer

Questions