The ship powering performance can be predicted based on model tests or simulations. However, differences exist between the full-scale and extrapolated data. Therefore, research simulation has important scientific significance engineering value. This study used REGAL general cargo vessel to perform resistance self-propulsion simulations for various grid numbers, time step sizes, wall Y+ values c...

Conventional explicit time-domain methods used to solve Maxwell's equations are reliable and robust but conditionally stable often require the fulfillment of condition Courant-Friedrichs-Lewy (CFL) ≤ 1. While this is acceptable for many applications, in some instances, where solved alongside systems with slower propagation velocities, prove costly. This case nonrelativistic electromagnetic Part...

We consider the method-of-moments approach to solve Boltzmann equation of rarefied gas dynamics, which results in following moment-closure problem. Given a set moments, find underlying probability density function. The problem has infinitely many solutions and requires an additional optimality criterion single-out unique solution. Motivated from discontinuous Galerkin velocity discretization, w...

In this study, the kinetic inviscid flux (KIF) is improved and an implicit strategy coupled. The recently proposed KIF a kind of flux, whose microscopic mechanism makes it good at solving shock waves, with advantages against instability phenomenon. When developing KIF, phenomenon noticed that vector splitting (KFVS) part in boundary layers not only reduces accuracy, but seriously Courant-Friedr...

The explicit time-domain spectral-element method (SEM) for synthesizing seismograms has gained tremendous credibility within the seismological community at all scales. Although recent introduction of nonperiodic homogenization addressed spatial meshing difficulty mechanical discontinuities, Courant-Friedrichs-Lewy (CFL) stability criterion strictly constrains maximum time step, which still puts...

The alternating direction implicit (ADI) method is an attractive option to use in avoiding the CourantFriedrichs-Lewy (CFL) condition that limits the size of the time step required by explicit finite-difference time-domain (FDTD) methods for stability. Implicit methods like Crank-Nicholson offer the same advantages as ADI methods but they do not rely on simple, one-dimensional, tridiagonal syst...

Finite-Difference Time-Domain (FDTD) subgridding schemes can significantly improve efficiency of various electromagnetic circuit simulations. However, numerous subgridding schemes suffer from issues associated with stability, efficiency, and material traverse capability. These issues limit general applicability of FDTD subgridding schemes to realistic problems. Herein, a robust nonuniform subgr...

OBJECTIVES To assess olfactory function of patients with dementia. Odour detection ability is impaired in clinical Parkinson's disease. Evidence of impaired detection in patients with clinically diagnosed Alzheimer's disease is inconsistent. No studies of olfaction have been neuropathologically validated. METHODS The olfactory function of 92 patients with dementia and 94 controls was assessed...

Objectives—To assess olfactory function of patients with dementia. Odour detection ability is impaired in clinical Parkinson’s disease. Evidence of impaired detection in patients with clinically diagnosed Alzheimer’s disease is inconsistent. No studies of olfaction have been neuropathologically validated. Methods—The olfactory function of 92 patients with dementia and 94 controls was assessed u...

We study temporal step size control of explicit Runge-Kutta methods for compressible computational fluid dynamics (CFD), including the Navier-Stokes equations and hyperbolic systems conservation laws such as Euler equations. demonstrate that error-based approaches are convenient in a wide range applications compare them to more classical based on Courant-Friedrichs-Lewy (CFL) number. Our numeri...