Articles techniques et présentations

Simulation models for steady state thermal hydraulics analyses of ORNL’s HFIR have been developed using COMSOL. A single fuel plate and coolant channel of each type of HFIR fuel element was modeled in three dimensions. The standard k-? turbulence model was used in simulating turbulent ... En savoir plus

Packed bed microreactors (PBMR) and ferrofluids are independently enormously used in a broad range of applications in the healthcare sector. In a PBMR, one of the primary factors for controlling the reaction rate is the bed porosity which immediately affects the catalyst distribution and ... En savoir plus

A current research and development project is ongoing to convert the operating High Flux Isotope Reactor (HFIR) of Oak Ridge National Laboratory (ORNL) from highly-enriched uranium (HEU U3-O8) fuel to low-enriched uranium (LEU U-Mo) fuel. Because LEU HFIR-specific testing and experiments ... En savoir plus

Induction heating (IH) [1] is an electrically driven process useful for decarbonization of the industry. It can be used for electrification of chemical processes to replace traditional heating with gas burner and avoid CO2 emission. This kind of process can be used to heat efficiently ... En savoir plus

Oak Ridge National Laboratory’s High Flux Isotope Reactor (HFIR) is the highest flux reactor-based source of neutrons for research in the United States. Thermal and cold neutrons produced by HFIR are used to study physics, chemistry, material science, engineering, and biology. Currently, ... En savoir plus

Bioreactors play a critical role in cultivating biological cells for various applications, such as pharmaceutical production and tissue engineering. Optimizing the cultivation process requires a deep understanding of the flow characteristics within the bioreactor medium. In this study, ... En savoir plus

High-temperature superconductor (HTS) technology is more and more commercially exploited, mainly for nuclear fusion reactors. The demand for HTS tape is met by multiple commercial manufacturers; there is a mature production process. With this technology now available, some other ... En savoir plus

The blast furnace shaft is a huge counter flow reactor in which heat and mass exchange play a significant role in its mathematical modelling. The heat exchange model is already available in COMSOL Multiphysics® via the Local Thermal Non-Equilibrium interface. This multiphysics coupling ... En savoir plus

The progress within the field of additive manufacturing has eased the fabrication of new reactor geometries significantly. It is possible to design and print a reactor of tailored shape and size at comparatively low costs and short time. Printing and testing all sensible reactor designs ... En savoir plus

The complete modelling of free radical polymerization (FRP) in a flow microreactor is dependent upon various transport processes - mass, momentum and heat transfer alongwith chemical reaction. And top of that, all processes are coupled to each other thus making modelling and simulation ... En savoir plus