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Stephen M. Bajorek

Bio: Stephen M. Bajorek is an academic researcher from Nuclear Regulatory Commission. The author has contributed to research in topics: Two-phase flow & Leidenfrost effect. The author has an hindex of 15, co-authored 61 publications receiving 619 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, a new single-phase convective heat transfer augmentation correlation has been developed using single phase steam cooling experimental data obtained from the Penn State/NRC Rod Bundle Heat Transfer (RBHT) facility.

48 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of liquid subcooling, material properties and surface conditions on the film pool boiling heat transfer using stainless steel (SS), zirconium (Zr), and Inconel-600 rods were explored.

47 citations

Journal ArticleDOI
TL;DR: In this article, the effects of pipe size on horizontal air-water two-phase flow in a wide range of flow configurations were investigated. But the results were not reflected on the flow regime maps employed in the nuclear reactor system analysis codes.

45 citations

Journal ArticleDOI
TL;DR: In this article, a comprehensive literature review of liquid entrainment in horizontal pipes with vertical-up branches is presented, and a model for predicting the onset and steady-state entraining rate is developed to predict branch quality at high liquid flow rates.

42 citations

Journal ArticleDOI
TL;DR: In this paper, an adiabatic upward air-water flow experiment was performed on a vertical pipe with 25.4mm inner diameter to investigate the interface structure and characteristics, including time-averaged void fraction, interfacial area concentration, bubble interfacial velocity and Sauter mean diameter.

38 citations


Cited by
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Book
01 Jan 1994
TL;DR: In this paper, recent developments in three dimensional and unsteady turbulence boundary layer computations are discussed, including the physics of convention solidification interaction, the continental shelf bottom boundary layer, gravity currents in rotating systems, eddies, waves, circulation, and mixing.
Abstract: This book covers the following topics: recent developments in three dimensional and unsteady turbulence boundary-layer computations; flows far from equilibrium via molecular dynamics; physics of convention-solidification interaction; the continental shelf bottom boundary layer; gravity currents in rotating systems; strange attractors in fluids: another view; eddies, waves, circulation, and mixing: statistical geofluid mechanics; regular and mach reflection of shock waves; ship propellers; coherent structures; the critical layer and stability; general circulation of the oceans; characteristic-based schemes for the euler equations; vortex flows in aerodynamics; steady and unsteady boundary-layer separation; and wind wave prediction.

183 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the available literature and information on thermal hydraulic phenomena that occur during small break LOCAs in AP1000, which included the critical flow, natural circulation, counter-current flow limiting, entrainment, reactor vessel level swell, direct contact condensation and thermal stratification.

61 citations

01 Jan 1998
TL;DR: Direct numerical and large eddy simulations are powerful tools for analyses of turbulent flows at low and large Reynolds or Rayleigh numbers in fundamental research as discussed by the authors, and the progress achieved with subgrid scale models and numerics makes the method attractive for investigations in nuclear research and engineering.
Abstract: Direct numerical and large eddy simulations are powerful tools for analyses of turbulent flows at low and large Reynolds or Rayleigh numbers in fundamental research. The current status of both methods and recent extensions are compiled. The progress achieved with subgrid scale models and numerics makes the method attractive for investigations in nuclear research and engineering. Applications of both methods of realistic technical flows are discussed. Open problems are mainly related to more general subgrid scale models for large complex containers, to the wall and inlet conditions for high Reynolds number and buoyant flows, and to discretisation schemes for local refinement of spatial resolution. As a classical example for the use of direct simulations, results are presented for a turbulent internally heated horizontal fluid layer. The analysis of the closure terms in the transport equation of the kinetic energy demonstrates major difficulties of the conventional statistical modelling for partially stably stratified convection.

52 citations