# DEVELOPMENT AND VALIDATION OF A MULTIFIELD MODEL OF CHURN-TURBULENT GAS/LIQUID FLOWS

## Abstract

The accuracy of numerical predictions for gas/liquid two-phase flows using Computational Multiphase Fluid Dynamics (CMFD) methods strongly depends on the formulation of models governing the interaction between the continuous liquid field and bubbles of different sizes. The purpose of this paper is to develop, test and validate a multifield model of adiabatic gas/liquid flows at intermediate gas concentrations (e.g., churn-turbulent flow regime), in which multiple-size bubbles are divided into a specified number of groups, each representing a prescribed range of sizes. The proposed modeling concept uses transport equations for the continuous liquid field and for each bubble field. The overall model has been implemented in the NPHASE-CMFD computer code. The results of NPHASE-CMFD simulations have been validated against the experimental data from the TOPFLOW test facility. Also, a parametric analysis on the effect of various modeling assumptions has been performed.

- Authors:

- Publication Date:

- Research Org.:
- Idaho National Laboratory (INL)

- Sponsoring Org.:
- USDOE

- OSTI Identifier:
- 1023455

- Report Number(s):
- INL/CON-08-14907

TRN: US201118%%1036

- DOE Contract Number:
- DE-AC07-05ID14517

- Resource Type:
- Conference

- Resource Relation:
- Conference: International Conference on Nuclear Engineering (ICONE-17),Brussels, Belgium,07/12/2009,07/16/2009

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 10 SYNTHETIC FUELS; ACCURACY; BUBBLES; COMPUTER CODES; NUCLEAR ENGINEERING; PARAMETRIC ANALYSIS; SIMULATION; TRANSPORT; TWO-PHASE FLOW; VALIDATION; computational multiphase fluid dynamics (CMFD), mu

### Citation Formats

```
Elena A. Tselishcheva, Steven P. Antal, Michael Z. Podowski, and Donna Post Guillen.
```*DEVELOPMENT AND VALIDATION OF A MULTIFIELD MODEL OF CHURN-TURBULENT GAS/LIQUID FLOWS*. United States: N. p., 2009.
Web. doi:10.1115/ICONE17-75210.

```
Elena A. Tselishcheva, Steven P. Antal, Michael Z. Podowski, & Donna Post Guillen.
```*DEVELOPMENT AND VALIDATION OF A MULTIFIELD MODEL OF CHURN-TURBULENT GAS/LIQUID FLOWS*. United States. doi:10.1115/ICONE17-75210.

```
Elena A. Tselishcheva, Steven P. Antal, Michael Z. Podowski, and Donna Post Guillen. Wed .
"DEVELOPMENT AND VALIDATION OF A MULTIFIELD MODEL OF CHURN-TURBULENT GAS/LIQUID FLOWS". United States.
doi:10.1115/ICONE17-75210. https://www.osti.gov/servlets/purl/1023455.
```

```
@article{osti_1023455,
```

title = {DEVELOPMENT AND VALIDATION OF A MULTIFIELD MODEL OF CHURN-TURBULENT GAS/LIQUID FLOWS},

author = {Elena A. Tselishcheva and Steven P. Antal and Michael Z. Podowski and Donna Post Guillen},

abstractNote = {The accuracy of numerical predictions for gas/liquid two-phase flows using Computational Multiphase Fluid Dynamics (CMFD) methods strongly depends on the formulation of models governing the interaction between the continuous liquid field and bubbles of different sizes. The purpose of this paper is to develop, test and validate a multifield model of adiabatic gas/liquid flows at intermediate gas concentrations (e.g., churn-turbulent flow regime), in which multiple-size bubbles are divided into a specified number of groups, each representing a prescribed range of sizes. The proposed modeling concept uses transport equations for the continuous liquid field and for each bubble field. The overall model has been implemented in the NPHASE-CMFD computer code. The results of NPHASE-CMFD simulations have been validated against the experimental data from the TOPFLOW test facility. Also, a parametric analysis on the effect of various modeling assumptions has been performed.},

doi = {10.1115/ICONE17-75210},

journal = {},

number = ,

volume = ,

place = {United States},

year = {Wed Jul 01 00:00:00 EDT 2009},

month = {Wed Jul 01 00:00:00 EDT 2009}

}