Benchmark database on the evolution of two-phase flows in a vertical pipe

Lucas, Dirk; Beyer, Matthias; Kussin, J.; Schütz, P.

doi:10.1016/j.nucengdes.2009.11.010

Cited by 32 publications

(10 citation statements)

References 9 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After adiabatic air-water flows (Lucas et al, 2010) and flows with condensing steam bubbles a test series on evaporating flows caused by pressure relief was conducted at Variable Gas Injection test section (Lucas et al, 2011). It consists of a vertical pipe with an inner diameter of 195.3 mm and a length of about 8 m.…”

Section: Experimental Setup and Measuring Techniquementioning

confidence: 99%

Simulations of flashing experiments in TOPFLOW facility with TRACE code

Mikuž

Tiselj

Beyer

et al. 2015

Nuclear Engineering and Design

View full text Add to dashboard Cite

Section: Experimental Setup and Measuring Techniquementioning

confidence: 99%

Simulations of flashing experiments in TOPFLOW facility with TRACE code

Mikuž

Tiselj

Beyer

et al. 2015

Nuclear Engineering and Design

View full text Add to dashboard Cite

“…Flow structure visualization studies [7] show a clear separation of bubble sizes. In reality, the bubble size distribution is polydisperse as evidenced by the experimental data [8], but since the bubble size distribution is largely bimodal, such flows are often successfully simplified by considering the flow to consist of a small and a large bubble group. Two bubble groups are the minimum number of size groups needed since the interfacial forces act quite different between the groups.…”

Section: Multifield Model Formulationmentioning

confidence: 99%

“…A partial validation of the CMFD model was performed to confirm the validity of the hydrodynamic simulations without chemistry [26]. Computational simulations of upward, co-current adiabatic air-water flow in a vertical pipe are compared to high-quality experimental data from the Transient twO Phase FLOW test facility (TOPFLOW) at the Institute of Safety Research at the Forschungszentrum DresdenRossendorf [8]. Two cases were selected from the TOPFLOW experiment database with two-phase flow in the churn-turbulent flow regime.…”

Section: Model Testing and Validationmentioning

confidence: 99%

Development of a computational multiphase flow model for Fischer Tropsch synthesis in a slurry bubble column reactor

Guillen

Grimmett

Gandrik

et al. 2011

Chemical Engineering Journal

View full text Add to dashboard Cite

The Hybrid Energy Systems Testing (HYTEST) Laboratory at the Idaho National Laboratory was established to develop and test hybrid energy systems with the principal objective of reducing dependence on imported fossil fuels. A central component of the HYTEST is the slurry bubble column reactor (SBCR) in which the gas-to-liquid reactions are performed to synthesize transportation fuels using the Fischer Tropsch (FT) process. These SBCRs operate in the churn-turbulent flow regime, which is characterized by complex hydrodynamics, coupled with reacting flow chemistry and heat transfer. Results Our team is developing a research tool to aid in understanding the physicochemical processes occurring in the SBCR. A robust methodology to couple reaction kinetics and mass transfer into a four-field model (consisting of the bulk liquid, small bubbles, large bubbles and solid catalyst particles) consisting of thirteen species, which are CO reactant, H 2 reactant, hydrocarbon product, and H 2 O product in small bubbles, large bubbles, and the bulk fluid plus catalyst is outlined. Mechanistic submodels for interfacial momentum transfer in the churn-turbulent flow regime are incorporated, along with bubble breakup/coalescence and two-phase turbulence submodels. The absorption and kinetic models, specifically changes in species concentrations, have been incorporated into the mass continuity equation. The reaction rate is based on the macrokinetic model for a cobalt catalyst developed by Yates and Satterfield. The model includes heat generation produced by the exothermic chemical reaction, as well as heat removal from a constant temperature heat exchanger. A property method approach is employed to incorporate vapor-liquid equilibrium (VLE) in a robust manner. Physical and thermodynamic properties as functions of changes in both pressure and temperature are obtained from VLE calculations performed external to the CMFD solver. The novelty of this approach is in its simplicity, as well as its accuracy over a specified temperature and pressure range.

show abstract

“…Several investigations have shown the capability of these sensors to provide valuable data for different gas-liquid two-phase flows. Example are: bubble size and local gas volume fraction distribution in a rectangular bubble column by Krepper et al [4], data on the evolution of co-current air-water two phase flows by Lucas et al [2], experimental investigations of horizontal slug flows by Da Silva et al [10], and others. The data obtained by such measurements have been used extensively for CFD code development and validation.…”

Section: Introductionmentioning

confidence: 99%