Search Results - "Bostjan Koncar"

Numerical and experimental investigation of convective flow boiling in vertical annulus using CFD code: Effect of mass flow rate and wall heat fluxes by Bouaichaoui, Youcef, Končar, Bostjan

“…•Numerical and experimental investigation of convective flow boiling.•CFD modeling of the convective subcooled flow boiling in an annular channel.•CFD…”
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CFD modelling of subcooled boiling—Concept, validation and application to fuel assembly design by Krepper, Eckhard, Končar, Bostjan, Egorov, Yury

“…The paper describes actual Computational Fluid Dynamics (CFD) approaches to subcooled boiling and investigates their capability to contribute to fuel assembly…”
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Quantifying heat losses from experimental setup and their effect on annular channel heat flux using CFD by Zajec, Boštjan, Mikuž, Blaž, Basavaraj, Anil Kumar, Matkovič, Marko, Tekavčič, Matej, Draksler, Martin, Cizelj, Leon, Končar, Boštjan

“…An advanced experimental setup in the form of a double-pipe heat exchanger has been developed to investigate various flow and heat transfer regimes in an…”
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Structural integrity evaluation of the DTT plasma facing unit using detailed CFD and thermo-mechanical analyses by Tarfila, Patrik, Costa Garrido, Oriol, Končar, Boštjan, Martelli, Emanuela, Giorgetti, Francesco, Roccella, Selanna

“…•CFD results show that water does not boil under the plasma heat loads.•Rotations of the PFU supports are captured by the appropriate boundary…”
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Parametric study of population balance model on the DEBORA flow boiling experiment by Aljosa Gajsek, Matej Tekavcic, Bostjan Koncar

“…In two-fluid simulations of flow boiling, the modeling of the mean bubble diameter is a key parameter in the closure relations governing the intefacial…”
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Analysis of thermal response of new diagnostic probe in TCV by Končar, Boštjan, Draksler, Martin, Kovačič, Jernej, Schneider, Bernd S., Ionita, Codrina, Gyergyek, Tomaž, Tsui, Cedric Kar-Wai, Schrittwieser, Roman

“…•Thermal response of the new probe head during triple plunge into the TCV tokamak has been analysed numerically.•The applied heat load corresponds to the heat…”
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Two-Phase Flow Heat Transfer in Nuclear Reactor Systems by Končar, Boštjan, Krepper, Eckhard, Bestion, Dominique, Song, Chul-Hwa, Hassan, Yassin A.

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Large eddy simulation of multiple impinging jets in hexagonal configuration – Mean flow characteristics by Draksler, Martin, Ničeno, Bojan, Končar, Boštjan, Cizelj, Leon

“…•LES was conducted to obtain the mean flow characteristics of multiple impinging jets.•Results were validated on hexagonal configuration benchmark.•Good…”
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Effect of nozzle sizes on jet impingement heat transfer in He-cooled divertor by Končar, Boštjan, Norajitra, Prachai, Oblak, Klemen

“…The use of impinging jets for divertor cooling in the conceptual fusion power plant is attracting much attention due to its very high heat removal capability…”
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Wall function approach for boiling two-phase flows by Končar, Boštjan, Borut, Mavko

“…One of the important goals of the NURESIM project is to assess and improve the simulation capability of the three-dimensional two-fluid codes for prediction of…”
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Influence of multiple jet cooling on the heat transfer and thermal stresses in DEMO divertor cooling finger by Končar, Boštjan, Simonovski, Igor, Draksler, Martin

“…The divertor concept for DEMO fusion reactor is based on modular design cooled by multiple impinging jets. Such divertor should be able to withstand a surface…”
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Influence of near-wall modelling on boiling flow simulation by Končar, Boštjan, Tiselj, Iztok

“…The capability of the three-dimensional two-fluid codes to simulate the local boiling flow processes has been assessed. Boiling flow experiments of Roy et al…”
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Thermo-mechanical analysis of a DEMO divertor cooling finger under the EFREMOV test conditions by Simonovski, Igor, Končar, Boštjan, Cizelj, Leon

“…A divertor component of the forthcoming DEMO fusion reactor should be able to withstand heat flux loads larger than 10 MW/m 2. Successful design should…”
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Simulation of turbulent flow in MATIS-H rod bundle with split-type mixing vanes by Končar, Boštjan, Košmrlj, Samo

“…•Blind numerical simulation of MATIS-H rod bundle with split-type mixing grid.•Fully hexahedral mesh in the mixing vane region was constructed.•Scale-resolved…”
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Effect of mass flow rate on bubble size distribution in boiling flow in temperature-controlled annular test section by Zajec, Boštjan, Cizelj, Leon, Končar, Boštjan

“…•Boiling of R245fa was investigated in horizontal temperature-controlled test section.•Bubble size distributions were determined with flow visualization and…”
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On the accuracy of Large Eddy Simulation of multiple impinging jets by Draksler, Martin, Končar, Boštjan, Cizelj, Leon

“…•Sensitivity study regarding the grid resolution and SGS model coefficient is reported.•The sampling error for single-point statistics at various locations is…”
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Experimental Analysis of Flow Boiling in Horizontal Annulus—The Effect of Heat Flux on Bubble Size Distributions by Zajec, Boštjan, Cizelj, Leon, Končar, Boštjan

“…Subcooled flow boiling was experimentally investigated in a horizontal annulus with a temperature-controlled boiling surface and transparent outer pipe…”
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Assessment of residual heat removal from activated breeding blanket segment during remote handling in DEMO by Draksler, Martin, Bachmann, Christian, Končar, Boštjan

“…•A residual heat removal during remote handling is investigated numerically.•The temperature of the activated DEMO breeding blanket (BB) is assessed.•Natural…”
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Large Eddy Simulation of multiple impinging jets in hexagonal configuration – Flow dynamics and heat transfer characteristics by Draksler, Martin, Končar, Boštjan, Cizelj, Leon, Ničeno, Bojan

“…•Flow and heat transfer characteristics of multiple impinging jets are studied by LES.•Dynamics of large-scale flow structures near the target wall is…”
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Parametric study of population balance model on the DEBORA flow boiling experiment by Gajšek, Aljoša, Tekavčič, Matej, Končar, Boštjan

“…In two-fluid simulations of flow boiling, the modeling of the mean bubble diameter is a key parameter in the closure relations governing the intefacial…”
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