Relative dispersion in fully developed turbulence is investigated by means of direct numerical simulations. Lagrangian statistics is found to be compatible with Richardson description although small systematic deviations are found. The value of the Richardson constant is estimated as C2 approximately equal to 0.55, in a close agreement with recent experimental findings [S. Ott and J. Mann, J. F...

x-acetylaminofiuorene N-hydroxy-2-acetylamino fluorene x-hydroxy-2-acetylamino fluorene 2-hydroxylaminonaphthalene Recently it has become apparent that an increasing number of carcinogens are capable of interacting with nucleic acids (10, 14, 923). These observations may be causally related to the mech anism of carcinogenesis as being a special case of mutagenesis. The chemical reactions of som...

Formal methods for verifying authentication protocols tend to assume an idealised perfect form of encryption This approach has been spec tacularly successful in nding aws but when we aim for proofs of cor rectness then we need to consider this assumption more carefully and perhaps to weaken it to re ect properties of real cryptographic mech anisms This paper reviews the existing CSP approach to...

In a previous paper (Comput. Methods Appl. Mech. Engrg 170, 223-237, 1999) we introduced a new method for computing the dominant Lyapunov exponent of a chaotic map by using spatial integration involving a matrix norm. We conjectured that this sequence of integrals decayed proportional to 1/n. We now prove this conjecture and derive a bound on the next term in the asymptotic expansion of the ter...

Complex turbine wake interactions play an important role in overall energy extraction in large wind farms. Current control strategies optimize individual turbine power, and lead to significant energy losses in wind farms compared with lone-standing wind turbines. In recent work, an optimal coordinated control framework was introduced (Goit & Meyers 2015 J. Fluid Mech.768, 5-50 (doi:10.1017/jfm....

In this work, some implications of a recent model for the mechanical behavior of biological membranes (Deseri et al. in Continuum Mech Thermodyn 20(5):255-273, 2008) are exploited by means of a prototypical one-dimensional problem. We show that the knowledge of the membrane stretching elasticity permits to establish a precise connection among surface tension, bending rigidities and line tension...

A wide range of relative two-particle dispersion statistics from the Lagrangian Kinematic Simulation ~KS! model, which contains turbulent-like flow structures, compares well with Yeung’s @Phys. Fluids 6, 3416 ~1994!# DNS results. In particular, the Lagrangian flatness factor m4(t) compares excellently ~better than Heppe’s @J. Fluid Mech. 357, 167 ~1998!# nonlinear stochastic model!. For higher ...

Erratum to aParathyroid hormone-related peptide is involved in protection against invasion of tooth germs by bone via promoting the differentiation of osteoclasts during tooth developmento [Mech. Dev. 95 (2000) 189±200] Ji-Guang Liu, Makoto J. Tabata, Takafumi Fujii, Tomoharu Ohmori, Makoto Abe, Yasuyoshi Ohsaki, Joji Kato, Satoshi Wakisaka, Masahiro Iwamoto, Kojiro Kurisu* Department of Oral A...

The complex patterns observed in experiments on suspensions of swimming cells undergoing bioconvection have fascinated biologists, physicists and mathematicians alike for over a century. Theoretical models developed over the last few decades have shown a strong similarity with Rayleigh–Bénard thermal convection, albeit with a richer dynamical behaviour due to the orientational degrees of freedo...

Large-eddy simulation (LES) has traditionally been restricted to fairly simple geometries. This paper discusses LES of reacting flows in geometries as complex as commercial gas turbine engine combustors. The incompressible algorithm developed by Mahesh et al. (J. Comput. Phys., 2004, 197, 215–240) is extended to the zero Mach number equations with heat release. Chemical reactions are modeled us...