Search Results - "Končar, Boštjan"

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…”
Get full text

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…”
Get full text

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…”
Get full text

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…”
Get full text

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…”
Get full text

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…”
Get full text

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…”
Get full text

The concept of liquid inlet model and its effect on the flooding wave frequency in vertical air-water churn flow by Tekavčič, Matej, Končar, Boštjan, Kljenak, Ivo

“…•Flooding type waves in upward air-water churn flow in vertical tube were studied.•Three-dimensional two-phase flow simulation with interface sharpening was…”
Get full text

Uncertainty analysis of CFD benchmark case using optimal statistical estimator by Prošek, Andrej, Končar, Boštjan, Leskovar, Matjaž

“…•Uncertainty of CFD benchmark calculation is investigated.•Uncertainty analysis is performed with Monte Carlo using surrogate model.•Optimal statistical…”
Get full text

Thermal radiation analysis of DEMO tokamak by Končar, Boštjan, Draksler, Martin, Costa Garrido, Oriol, Meszaros, Botond

“…•Thermal radiation analysis of the DEMO tokamak was performed.•To complement the baseline tokamak model, thermal shields and lower part of the cryostat were…”
Get full text

Calorimeter conceptual design for Neutral Beam Injector of DTT - CFD optimisation and thermal stress analysis by Končar, Boštjan, Ovtar, Domen, Costa Garrido, Oriol, Agostinetti, Piero

“…A conceptual design of the calorimeter for the Neutral Beam Injector (NBI) of the Divertor Tokamak Test facility (DTT, a new tokamak whose construction is…”
Get full text

Initial optimization of DEMO fusion reactor thermal shields by thermal analysis of its integrated systems by Končar, Boštjan, Costa Garrido, Oriol, Draksler, Martin, Brown, Richard, Coleman, Matti

“…•Thermal analysis of integrated DEMO cold systems is performed.•Heat loads on thermal shields (TS) and magnets are evaluated.•Theoretical refrigeration power…”
Get full text

Simulation of Turbulent Wake at Mixing of Two Confined Horizontal Flows by Krpan, Rok, Končar, Boštjan

“…The development of a turbulent mixing layer at mixing of two horizontal water streams with slightly different densities is studied by the means of numerical…”
Get full text

Analysis of vertical co-current air-water flow with the Neptune_CFD by Tekavčič, Matej, Končar, Boštjan, Kljenak, Ivo

“…•Co-current air-water churn flow in a vertical pipe was investigated.•Dedicated multiphase software Neptune_CFD was used.•The calculated frequencies of liquid…”
Get full text

CFD analysis of the natural circulation of helium in the DEMO cryostat during a leak accident by Draksler, Martin, Končar, Boštjan, Tekavčič, Matej, Bachmann, Christian

“…•CFD analysis was used to study natural convection of leaked helium inside the DEMO cryostat.•Two scenarios with vacuum vessel operating at normal and baking…”
Get full text

CFD simulation of convective flow boiling of refrigerant in a vertical annulus by Končar, Boštjan, Krepper, Eckhard

“…In this paper a convective flow boiling of refrigerant R-113 in a vertical annular channel has been simulated by a CFD (Computational Fluid Dynamics) code CFX…”
Get full text

Simulation of flooding waves in vertical churn flow by Tekavčič, Matej, Končar, Boštjan, Kljenak, Ivo

“…•Flooding waves in air–water churn flow in a vertical pipe were studied.•Simulations using two-fluid model with interface sharpening were performed.•Calculated…”
Get full text

Analysis of heat transfer and flow characteristics in turbulent impinging jet by Draksler, Martin, Končar, Boštjan

“…Jet impingement technique is characterized by a high heat removal capability. As such it has been proposed as a cooling method for the helium cooled divertor,…”
Get full text

Pre-conceptual design of DEMO upper port duct bellows by Costa Garrido, Oriol, Končar, Boštjan, Brown, Richard, Bachmann, Christian

“…•Pre-conceptual study of the DEMO upper port duct bellows.•Bellows geometry and interface identification based on 2015 DEMO CAD model.•Identification and…”
Get full text

Modelling of local two-phase flow parameters in upward subcooled flow boiling at low pressure by Končar, Boštjan, Kljenak, Ivo, Mavko, Borut

“…The subject of the present work is a multidimensional modelling of vertical upward subcooled boiling flow using a two-fluid approach and calculation of local…”
Get full text