The critical heat flux (CHF) corresponding to the departure from nucleate boiling (DNB) crisis is a regulatory limit for licensing of pressurized water reactors (PWRs) worldwide. Despite abundance predictive tools available reactor thermal-hydraulics community, path an accurate CHF model remains elusive. This work approaches prediction DNB through physics-informed machine learning-aided framewo...

In order to predict the water-vapor two-phase flow dynamics in a fuel bundle of an advanced light-water reactor, large-scale numerical simulations were performed using a highly parallel-vector supercomputer, the earth simulator. Although conventional analysis methods such as subchannel codes and system analysis codes need composition equations based on the experimental data, it is difficult to ...

Bundling of microtubules (MTs) is critical for the formation of complex MT arrays. In land plants, the interphase cortical MTs form bundles specifically following shallow-angle encounters between them. To investigate how cells select particular MT contact angles for bundling, we used an in vitro reconstitution approach consisting of dynamic MTs and the MT-cross-linking protein MAP65-1. We found...

Helium flow in the rod bundle channel with an open lattice structure is important phenomenon for advanced gas-cooled nuclear core design. In this study, thermal analysis helium various designs conducted based on CFD methods to determine a dimension-optimized channel. An experimental study then follows order pick up appropriate gas model further numerical simulation. Finally, channels consisting...

We report an extensive simulation study on the spontaneous formation of complex micelles from coilrod-coil amphiphilic triblock copolymers in dilute solution resulting from solvent selectivity. The amphiphilic molecule is built from one hydrophilic block on each side and a hydrophobic block in the middle. The rigidity of the rod block is introduced by adding a bond-bending potential of the angl...

In this paper we review the concepts of the superalgebra, superderivation and some properties of them. We will define algebraic and differential superderivations on a superalgebra and will prove some theorems about them, Then we consider a superalgebra bundle, that is an algebra bundle which its fibers are superalgebras and then characterize the superderivations of the algebra of sections of th...

Peritrichously flagellated bacteria swim in a fluid environment by rotating motors embedded the cell membrane and consequently multiple helical flagella. We present novel mathematical model of microswimmer that can freely run propelled flagellar bundle tumble upon motor reversals. Our is composed rod-shaped rigid body flagella randomly distributed over body. These go through polymorphic transfo...