Prediction of Boiling and Critical Heat Flux Using an Eulerian Multiphase Boiling Model

Li, Huiying; Vásquez, Sergio; Punekar, Hemant; Muralikrishnan, R.

doi:10.1115/imece2011-65539

Cited by 32 publications

(32 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…_ m rq denotes the mass transfer from r th to q th phase, while _ m qr is the mass transfer from q th to r th phase. s q is the external mass source applied on the q th phase (Li et al, 2011).…”

Section: Governing Equationsmentioning

confidence: 99%

“…In equation (2), p is pressure, t ¼ q is stress-strain tensor in the q th phase, B f is the body force, F D rq is the interaction drag force between the two phases, F TD rq is the turbulent dispersed force, V rq and V qr are relative velocity vectors between the two phases, and F q , F L q and F vm q are the external body, lift and virtual mass exchange forces, respectively (Li et al, 2011).…”

Section: Governing Equationsmentioning

confidence: 99%

“…In addition to experimental researches, Li et al (2010) investigated the two phase boiling flow field in a vertical channel using RPI model developed by Ransselaer Polytechnic Institute in the available computational code named FLUENT. In the framework of analyzing, the water and vapor phases were considered separately based on EulerianeEulerian approach.…”

Section: Introductionmentioning

confidence: 99%

“…Comparing the results of the simulation with available experimental data including the distribution of the flow field parameters indicated acceptable accuracy in modeling the boiling phenomena. Again, Li et al (2011) simulated the boiling phenomenon as well as the dryout in a vertical channel using the CFD code. In this research, they predicted the location of the occurrence of the dryout phenomenon by modifying the wall heat flux partitioning.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

3-D numerical investigation of water/CuO nanofluid critical heat flux phenomenon in a PWR core channel during LOCA

Rabiee

Atf

2015

Progress in Nuclear Energy

View full text Add to dashboard Cite

Section: Governing Equationsmentioning

confidence: 99%

Section: Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

3-D numerical investigation of water/CuO nanofluid critical heat flux phenomenon in a PWR core channel during LOCA

Rabiee

Atf

2015

Progress in Nuclear Energy

View full text Add to dashboard Cite

“…The development of a full 3D mechanistic model of the flow boiling process is challenging [26] due to the complex nature of the processes involved (activation of nucleation sites, bubble dynamics, and interfacial heat transfers) and the computational needs required for the solution of the direct numerical problem, which incorporates a large number of bubbles and surfaces with complex geometries [27,28]. To overcome this challenge, semi-mechanistic approaches are proposed [29][30][31][32][33][34]. For example, Kurul and Podowski developed a 3D model which couples an Euler-Euler two-phase flow model (for bulk fluid flow) with a wall boiling model.…”

Section: Introductionmentioning

confidence: 99%

Modeling and design guidelines for direct steam generation solar receivers

et al. 2018

View full text Add to dashboard Cite

• A computational model for solar receiver for direct steam generation is developed.• Experiments are conducted and used to validate the model.• Practical designs, operational conditions and material choices are investigated.• Model provides design tool for direct steam generation solar cavity receivers. A R T I C L E I N F OKeyword: Solar energy Multi-mode heat transfer modeling Two-phase flow modeling Solar receiver Steam generator Concentrated solar A B S T R A C T Concentrated solar energy is an ideal energy source for high-temperature energy conversion processes such as concentrated solar power generation, solar thermochemical fuel production, and solar driven high-temperature electrolysis. Indirectly irradiated solar receiver designs utilizing tubular absorbers enclosed by a cavity are possible candidates for direct steam generation, allowing for design flexibility and high efficiency. We developed a coupled heat and mass transfer model of cavity receivers with tubular absorbers to guide the design of solardriven direct steam generation. The numerical model consisted of a detailed 1D two-phase flow model of the absorber tubes coupled to a 3D heat transfer model of the cavity receiver. The absorber tube model simulated the flow boiling phenomena inside the tubes by solving 1D continuity, momentum, and energy conservation equations based on a control volume formulation. The Thome-El Hajal flow pattern maps were used to predict liquid-gas distributions in the tubular cross-sections, and heat transfer coefficients and pressure drop along the tubes. The heat transfer coefficient and fluid temperature of the absorber tubes' inner surfaces were then extrapolated to the circumferential of the tube and used in the 3D cavity receiver model. The 3D steady state model of the cavity receiver coupled radiative, convective, and conductive heat transfer. The complete model was validated with experimental data and used to analyze different receiver types and designs made of different materials and exposed to various operational conditions. The proposed numerical model and the obtained results provide an engineering design tool for cavity receivers with tubular absorbers (in terms of tube shapes, tube diameter, and water-cooled front), support the choice of best-performant operation (in terms of radiative flux, mass flow rate, and pressure), and aid in the choice of the component materials. The model allows for an indepth understanding of the coupled heat and mass transfer in the solar receiver for direct steam generation and can be exploited to quantify the optimization potential of such solar receivers.

show abstract

Two‐phase flow boiling in 19 mm tube: Experiments and CFD modelling

2016

View full text Add to dashboard Cite

Boiling flows are encountered in a wide range of industrial applications such as boilers, nuclear reactors, electronic cooling, and various types of chemical reactors. Heat transfer coefficients, flow boiling regimes, flow instabilities, pressure drops, and conditions like dry-out are some of the key issues in every boiling flow study. It is observed that a limited experimental database is available for the 19 mm ID channel diameter, i.e. a typical tube diameter of steam generator. Therefore, in the present work, the experimental setup was designed for studying boiling flows in a 19 mm ID tube in such a way that different flow regimes occurring in a steam generator tube (from pre-heating of sub-cooled water to dry-out) could be investigated by varying inlet conditions. The reported results cover a reasonable range: 8-27 kW/m 2 and 2.9-5.9 kg/m 2 Á s heat and mass flux conditions, respectively. A basic computational flow model was also developed to facilitate interpretation of the obtained data. The presented design of the experimental setup and the approach of mimicking different types of steam generator tubes as well as presented experimental and simulated results are useful for gaining insight into complex boiling flows in tubes, and provide a sound basis for further work in this area.

show abstract

Prediction of Boiling and Critical Heat Flux Using an Eulerian Multiphase Boiling Model

Cited by 32 publications

References 0 publications

3-D numerical investigation of water/CuO nanofluid critical heat flux phenomenon in a PWR core channel during LOCA

3-D numerical investigation of water/CuO nanofluid critical heat flux phenomenon in a PWR core channel during LOCA

Modeling and design guidelines for direct steam generation solar receivers

Two‐phase flow boiling in 19 mm tube: Experiments and CFD modelling

Contact Info

Product

Resources

About