A determination of nominal flow phenomena in liquid metal fast reactor (LMFR) fuel assemblies is critical toward generation-IV development. Axially positioned spacer grids are used to maintain the geometry hexagonal rod bundles and simultaneously introduce perturbations flow. Three-dimensional (3D) printed asymmetric honeycomb were installed a prototypical 127-pin LMFR assembly model study comp...

in iran, onion plants are currently broadcast over the majority of onion fields and weeding and harvesting are done manually by seasonal workers. at harvest time, 40 worker-days are required to onion dig just one hectare. this cost could be saved if the operation could be carried out by machine. rear-mounted diggers can only be implemented if 40 cm spacing between rows is allowed for each tract...

To probe the potential for activity in unevolved amino acid sequence space, we created a third generation combinatorial library of de novo four-helix bundle proteins. The "artificial superfamily" of helical bundles was designed using binary patterning of polar and nonpolar residues, and expressed in Escherichia coli from a library of synthetic genes. WA20, picked from the library, is one of the...

Wall-bounded flows at high Reynolds number are characterized by high rates of shear at the walls. Resolving the flow near the wall, is critical to correctly reproducing the turbulence. In the present paper, we show that the accurate prediction of spatially varying wall shear stress requires additional near-wall resolution for large eddy simulation. We also demonstrate the advantage of the use o...

This paper presents the findings from a numerical simulation of the flow in 37-rod fuel assembly models spaced by a double-wire trapezoidal wrapping as applied to the BREST-OD-300 experimental nuclear reactor. Data on a high static pressure distribution within the models, and equations for determining the fuel bundle flow friction factors have been obtained. Recommendations are provided on usin...

Multiple total knee arthroplasty (TKA) failure resulting from a recurrent infection is a challenging problem. Knee arthrodesis is one treatment option that normally involves the application of an external fixator, plate fixation, and intramedullary nailing. However, these approaches are not always successful, and a reinfection is a risk, particularly in older, medically compromised patients. Th...