Dissipative particle dynamics (DPD) is a widely used coarse-grained technique for the simulation of complex fluids. Although method capable describing hydrodynamics any fluid, common choice DPD parameters, such as friction coefficient ?, dissipative cutoff radius r c D, coarse-graining factor Nm and weighting function exponent s, unrealistically leads to liquid water with low Schmidt number Sc ...

We describe a method to investigate the mode shapes in turbulent pipe flow at a given wavenumber pair that are most responsive to harmonic forcing in the sense that the they correspond to the largest singular value in a Schmidt decomposition of the linear NavierStokes operator using the turbulent mean profile as the base flow. The ideas follow logically from the work of Sharma & McKeon (2009), ...

Gabor Matthäus, Stefan Nolte, Rico Hohmuth, Martin Voitsch, Wolfgang Richter, Boris Pradarutti, Stefan Riehemann, Gunther Notni, and Andreas Tünnermann Institute of Applied Physics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, Jena D-07743, Germany BATOP GmbH, Wildenbruchstrasse 15, Jena D-07745, Germany Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein...

Abstract A number of destructive and non-destructive tests were conducted on rock samples collected from various zones in northern Iraq. So far, for Iraqi rocks, few studies have correlated Schmidt hammer rebound ( R ) with both unconfined compressive strength (UCS) Brazilian tensile (BTS). In this study, the objective is to develop a relationship between surface hardness (rebound number) BTS d...

A Schmidt group is a non-nilpotent finite group in which each proper subgroup is nilpotent. Each Schmidt group G can be described by three parameters p, q and v, where p and q are different primes and v is a natural number, v ≥ 1. Denote by S the class of all Schmidt groups which have the same parameters p, q and v. It is shown in this paper that the class S can be characterized by the properti...

Bounds on high-order derivative moments of a passive scalar are obtained for large values of the Schmidt number, Sc. The procedure is based on the approach pioneered by Batchelor for the viscous–convective range. The upper bounds for derivative moments of order n are shown to grow as Sc for very large Schmidt numbers. The results are consistent with direct numerical simulations of a passive sca...