Limpar
2.653 resultados

Acesso Aberto

Tipo do recurso

Ano de criação

Editores

Revisado por pares

Áreas

Produção nacional

Idioma

Tipo de base de dados

Artigo Revisado por pares

Robert Anderssen, A.R. Davies, F. R. de Hoog, R. J. Loy,

... of the storage and loss moduli, $G^{\prime }(\unicode[STIX]{x1D714})$ and $G^{\prime \prime }(\unicode[STIX]{x1D714})$ , respectively, are only measured and recorded for a number of values of the frequency $\unicode[STIX]{x1D714}$ in some well-defined finite range $[\unicode[STIX]{x1D714}_{\text{min}},\unicode[STIX]{x1D714}_{\text{max}}]$ . In many practical situations, when the range $[\unicode[STIX]{x1D714}_{\text{min}},\unicode[STIX]{x1D714}_{\text{max}}]$ is sufficiently large, information ... interrelationship between the frequency dependence of $G^{\prime }(\unicode[STIX]{x1D714})$ and $G^{\prime \prime }(\unicode[STIX]{ ...

Tópico(s): Material Dynamics and Properties

2016 - Cambridge University Press | The ANZIAM Journal

Artigo Revisado por pares

Michael Dodd, Antonino Ferrante,

... at initial Taylor-scale Reynolds number $\mathit{Re}_{\unicode[STIX]{x1D706}}=83$ . In the droplet-laden cases, ... droplet- to carrier-fluid density ratio ( $1\leqslant \unicode[STIX]{x1D70C}_{d}/\unicode[STIX]{x1D70C}_{c}\leqslant 100$ ) or the droplet- to carrier-fluid viscosity ratio ( $1\leqslant \unicode[STIX]{x1D707}_{d}/\unicode[STIX]{x1D707}_{c}\leqslant 100$ ). In this work, ... DNS results show that increasing $\mathit{We}_{rms}$ , $\unicode[STIX]{x1D70C}_{d}/\unicode[STIX]{x1D70C}_{c}$ and $\unicode[STIX]{x1D707}_{d}/\ ...

Tópico(s): Fluid Dynamics and Turbulent Flows

2016 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Acesso aberto Revisado por pares

Terence Tao,

Let $\unicode[STIX]{x1D706}$ denote the Liouville function. The Chowla conjecture, in the two-point correlation case, asserts that $$\begin{eqnarray}\mathop{\sum }_{n\leqslant x}\unicode[STIX]{x1D706}(a_{1}n+b_{1})\unicode[STIX]{x1D706}(a_{2}n+b_{2})=o( ... logarithmically averaged version $$\begin{eqnarray}\mathop{\sum }_{x/\unicode[STIX]{x1D714}(x)<n\leqslant x}\frac{\unicode[STIX]{x1D706}(a_{1}n+b_{1})\unicode[STIX]{x1D706}(a_{2}n+b_{2})}{n}=o(\log \unicode[STIX]{x1D714}(x))\end{eqnarray}$$ of the Chowla conjecture as $x\rightarrow \infty$ , where $1\leqslant \unicode[STIX]{x1D714}(x)\leqslant x$ is an arbitrary ...

Tópico(s): Limits and Structures in Graph Theory

2016 - Cambridge University Press | Forum of Mathematics Pi

Artigo Revisado por pares

Wen-Xin Qin, Yanan Wang,

... of an exact area-preserving twist map $\bar{\unicode[STIX]{x1D711}}$ and consider the tilted Frenkel–Kontorova ( ... depinning force is the critical value $F_{d}(\unicode[STIX]{x1D714})$ depending on the mean spacing $\unicode[STIX]{x1D714}$ of particles, above which the tilted ... exists an invariant circle with irrational rotation number $\unicode[STIX]{x1D714}$ for $\bar{\unicode[STIX]{x1D711}}$ if and only if $F_{d}(\unicode[STIX]{x1D714})=0$ . For rational $\unicode[STIX]{x1D714}$ , $F_{d}(\unicode[STIX]{x1D714})=0$ ...

Tópico(s): Theoretical and Computational Physics

2016 - Cambridge University Press | Ergodic Theory and Dynamical Systems

Artigo Revisado por pares

Jinyul Hwang, Jin Lee, Hyung Jin Sung,

... turbulent pipe and channel flows at $\mathit{Re}_{\unicode[STIX]{x1D70F}}\approx 930$ are used to investigate ... arise from the dominant contributions of the LSMs ( $\unicode[STIX]{x1D706}_{x}>3\unicode[STIX]{x1D6FF}$ ) to the Reynolds shear stress in ... the spectra of velocity–vorticity correlations, $\langle v\unicode[STIX]{x1D714}_{z}\rangle$ and $\langle -w\unicode[STIX]{x1D714}_{y}\rangle$ , which are related to ... is due to the contribution of $\langle -w\unicode[STIX]{x1D714}_{y}\rangle$ at longer wavelengths ( $\unicode[ ...

Tópico(s): Plant Water Relations and Carbon Dynamics

2016 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Revisado por pares

Saikat Saha, Meheboob Alam,

... to analytical expressions for the first and second ( $\unicode[STIX]{x1D615}_{1}$ and $\unicode[STIX]{x1D615}_{2}$ ) normal stress differences and other ... Burnett-order constitutive relations. Theoretical expressions for both $\unicode[STIX]{x1D615}_{1}$ and $\unicode[STIX]{x1D615}_{2}$ and those for pressure and ... 0.5$ ). While the first normal stress difference $\unicode[STIX]{x1D615}_{1}$ is found to be positive ... the dense limit, the second normal stress difference $\unicode[STIX]{x1D615}_{2}$ is negative and positive in ...

Tópico(s): Material Dynamics and Properties

2016 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Revisado por pares

Qing Meng,

Let $\unicode[STIX]{x1D6E4}$ be a countable discrete group that acts on a unital $C^{\ast }$ -algebra $A$ through an action $\unicode[STIX]{x1D6FC}$ . If $A$ has a faithful $\unicode[STIX]{x1D6FC}$ -invariant tracial state $\unicode[STIX]{x1D70F}$ , then $\unicode[STIX]{x1D70F}^{\prime }=\unicode[STIX]{x1D70F}\circ {\mathcal{E}}$ is a faithful tracial state of $A\rtimes _{\unicode[STIX]{x1D6FC},r}\unicode[STIX]{x1D6E4}$ where ${\mathcal{E}}:A\rtimes _{\unicode[STIX]{x1D6FC},r}\unicode[STIX]{x1D6E4}\rightarrow A$ is the canonical faithful ...

Tópico(s): Algebraic structures and combinatorial models

2016 - Cambridge University Press | Bulletin of the Australian Mathematical Society

Artigo Acesso aberto Revisado por pares

Henri Comman,

... action (or $(\mathbb{N}\cup \{0\})^{l}$ -action) $\unicode[STIX]{x1D70F}$ on a non-empty compact metrisable space $\unicode[STIX]{x1D6FA}$ , for some $l\in \mathbb{N}$ . ... of the restriction of the entropy map $h^{\unicode[STIX]{x1D70F}}$ to the set of ergodic states is dense in the graph of $h^{\unicode[STIX]{x1D70F}}$ . We assume that $h^{\unicode[STIX]{x1D70F}}$ is finite and upper semi-continuous. ... notion: Gateaux differentiability of the pressure map $P^{\unicode[STIX]{x1D70F}}$ on some sets dense in the space $C(\unicode[STIX]{x1D6FA})$ of real-valued continuous functions on $\ ...

Tópico(s): advanced mathematical theories

2016 - Cambridge University Press | Ergodic Theory and Dynamical Systems

Artigo Acesso aberto Revisado por pares

Yantao Yang, Roberto Verzicco, Detlef Lohse,

... a very weak dependence on the density ratio $\unicode[STIX]{x1D6EC}$ , which is the ratio of the ... are dependent on both $\mathit{Ra}_{S}$ and $\unicode[STIX]{x1D6EC}$ . However, the rescaled Reynolds number $Re\unicode[STIX]{x1D6EC}^{\unicode[STIX]{x1D6FC}_{u}^{eff}}$ and the rescaled convective heat flux $(\mathit{Nu}_{T}-1)\unicode[STIX]{x1D6EC}^{\unicode[STIX]{x1D6FC}_{T}^{eff}}$ depend only on $\mathit{ ... and are determined from the numerical results as $\unicode[STIX]{x1D6FC}_{u}^{eff}=0.25\pm 0.02$ and $\unicode[STIX]{x1D6FC}_{T}^{eff}=0.75\pm 0. ...

Tópico(s): Plant Water Relations and Carbon Dynamics

2016 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Acesso aberto Revisado por pares

Ashish Patel, Bendiks Jan Boersma, René Pecnik,

... Navier–Stokes equations. Different constitutive relations for density $\unicode[STIX]{x1D70C}$ and viscosity $\unicode[STIX]{x1D707}$ as a function of temperature are ... of the semilocal Reynolds number, defined as $Re_{\unicode[STIX]{x1D70F}}^{\star }\equiv Re_{\unicode[STIX]{x1D70F}}\sqrt{(\overline{\unicode[STIX]{x1D70C}}/\overline{\unicode[STIX]{x1D70C}}_{w})}/(\overline{\unicode[STIX]{x1D707}}/\overline{\unicode[STIX]{x1D707}}_{w})$ (the bar and subscript $w$ ... Reynolds averaging and wall value respectively, while $Re_{\unicode[STIX]{x1D70F}}$ is the friction Reynolds number based ...

Tópico(s): Combustion and flame dynamics

2016 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Revisado por pares

Ping Wei, Guenter Ahlers,

... 12.3$ in cylindrical samples with aspect ratios $\unicode[STIX]{x1D6E4}$ (diameter $D$ over height $L$ ) of ... The measurements were primarily for the radial positions $\unicode[STIX]{x1D709}=1-r/(D/2)=1.00$ and $\unicode[STIX]{x1D709}=0.063$ . In both cases, data ... by the power law $P(f)\sim f^{-\unicode[STIX]{x1D6FC}}$ . For all $\unicode[STIX]{x1D709}$ and $\unicode[STIX]{x1D6E4}$ , the $\unicode[STIX]{x1D6FC}$ value is less than one near ... Mech. , vol. 731, 2013, pp. 46–63), where $\unicode[STIX]{x1D6FC}=1$ is found or expected in ...

Tópico(s): Wind and Air Flow Studies

2016 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Acesso aberto Revisado por pares

Hesam Salehipour, C. P. Caulfield, W. R. Peltier,

... tanh (z/d)$ and initial density distribution $\overline{\unicode[STIX]{x1D70C}}(z,0)=\unicode[STIX]{x1D70C}_{0}[1-\tanh (z/\unicode[STIX]{x1D6FF})]$ away from a hydrostatic reference state $\unicode[STIX]{x1D70C}_{r}\gg \unicode[STIX]{x1D70C}_{0}$ . When the ratio $R=d/\unicode[STIX]{x1D6FF}$ of the characteristic length scales over ... Richardson number $Ri_{g}(0)=Ri_{b}=g\unicode[STIX]{x1D70C}_{0}d/\unicode[STIX]{x1D70C}_{r}U_{0}^{2}$ , where $Ri_{g}(z)=-([g/\unicode[STIX]{x1D70C}_{r}]\,\text{d}\overline{\unicode[STIX]{ ...

Tópico(s): Meteorological Phenomena and Simulations

2016 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Acesso aberto Revisado por pares

B. H. Burgess, R. K. Scott,

... E\sim t$ yield three length scales, $l_{\unicode[STIX]{x1D714}}$ , $l_{E}$ and $l_{\unicode[STIX]{x1D713}}$ , associated with the vorticity field, energy ... areas grow linearly in time, $A\sim l_{\unicode[STIX]{x1D714}}^{2}\sim t$ , while the spectral peak wavenumber $k_{E}\equiv 2\unicode[STIX]{x03C0}l_{E}^{-1}\sim t^{-1}$ . ... vortex number density distribution, $n(A)\sim t^{\unicode[STIX]{x1D6FC}_{i}}A^{-r_{i}},~i\in ... v}^{cm}=(2{\mathcal{D}})^{-1}\int \overline{\unicode[STIX]{x1D714}_{v}^{2}}A^{2}n(A)\,\ ... d}A$ is conserved in $A$ -space intervals $[\unicode[STIX]{x1D707}A_{0}(t),A_{0}(t)]$ ...

Tópico(s): Meteorological Phenomena and Simulations

2016 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

Amanda de Lima, Daniel Smania,

... classes of such maps. Given a Lipchitz observable $\unicode[STIX]{x1D719}$ consider the function $$\begin{eqnarray}{\mathcal{R}}_{\unicode[STIX]{x1D719}}(t)=\int \unicode[STIX]{x1D719}\,d\unicode[STIX]{x1D707}_{t},\end{eqnarray}$$ where $\unicode[STIX]{x1D707}_{t}$ is the unique absolutely continuous invariant probability of $f_{t}$ . Suppose that $\unicode[STIX]{x1D70E}_{t}>0$ for every $t\in [a,b]$ , where $$\begin{eqnarray}\unicode[STIX]{x1D70E}_{t}^{2}=\unicode[STIX]{x1D70E}_{t}^{2}(\unicode[STIX]{x1D719})=\lim _{ ...

Tópico(s): Stochastic processes and statistical mechanics

2016 - Cambridge University Press | Journal of the Institute of Mathematics of Jussieu

Artigo Acesso aberto Revisado por pares

K.L. de Graaf, PA Brandner, BW Pearce,

... 1.5\times 10^{6}$ with cavitation numbers, $\unicode[STIX]{x1D70E}$ , ranging from inception to supercavitation. Three ... regimes are identified: a uni-modal regime for $\unicode[STIX]{x1D70E}>0.9$ and two bi-modal regimes for $0.9>\unicode[STIX]{x1D70E}>0.675$ and $0.675>\unicode[STIX]{x1D70E}>0.3$ . For small cavity lengths ( $\unicode[STIX]{x1D70E}>0.9$ ), Kelvin–Helmholtz instability and ... breakup and coherent vortex formation. At greater lengths ( $\unicode[STIX]{x1D70E}<0.9$ ), larger-scale shedding ensues, ...

Tópico(s): Cavitation Phenomena in Pumps

2016 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Acesso aberto Revisado por pares

Ory Schnitzer,

... of bubbles in the small-solid-fraction limit $\unicode[STIX]{x1D716}\ll 1$ . Using scaling arguments and ... elucidate the singularity of the slip length as $\unicode[STIX]{x1D716}\rightarrow 0$ : relative to the periodicity it scales as $\log (1/\unicode[STIX]{x1D716})$ for protrusion angles $0\leqslant \unicode[STIX]{x1D6FC}<\unicode[STIX]{x03C0}/2$ and as $\unicode[STIX]{x1D716}^{-1/2}$ for $0<\unicode[STIX]{x03C0}/2-\unicode[STIX]{x1D6FC}=O(\unicode[STIX]{x1D716}^{1/2})$ . We continue with a ...

Tópico(s): Fluid Dynamics and Thin Films

2017 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Acesso aberto Revisado por pares

Xindong Li, Zongmin Hu, Zonglin Jiang,

... theoretical formula for the bulk viscosity coefficient (BVC) $\unicode[STIX]{x1D701}$ is derived by the continuum medium ... further understanding of the bulk viscosity, i.e. $\unicode[STIX]{x1D701}$ is equal to the product of the bulk modulus $K$ and the relaxation time $\unicode[STIX]{x1D70F}$ ( $\unicode[STIX]{x1D701}=K\unicode[STIX]{x1D70F}$ ). The continuum and kinetic theories present ... of temperature. In addition, the vibrational contributions to $\unicode[STIX]{x1D701}$ are controlled by a rapid exponential ... proceeds for the rotational cases. The relaxation time $\unicode[STIX]{x1D70F}$ , collision number $Z$ , BVC $\unicode[STIX]{ ...

Tópico(s): Atomic and Subatomic Physics Research

2017 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Revisado por pares

Zhang Cao, Jin Wang, William K. Blake, Joseph Katz,

... map the deformation. The Reynolds number is $Re_{\unicode[STIX]{x1D70F}}=2300$ , and the Young’s modulus ... advected and non-advected modes are $0.04~\unicode[STIX]{x03BC}\text{m}$ $(0.004\unicode[STIX]{x1D6FF}_{\unicode[STIX]{x1D708}})$ and $0.2~\unicode[STIX]{x03BC}\text{m}$ ( $0.02\unicode[STIX]{x1D6FF}_{\unicode[STIX]{x1D708}}$ ), respectively, much smaller than the wall unit ( $\unicode[STIX]{x1D6FF}_{\unicode[STIX]{x1D708}}$ ), hence they do not affect the ...

Tópico(s): Aerodynamics and Acoustics in Jet Flows

2017 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Revisado por pares

Wan Cheng, D. I. Pullin, Ravi Samtaney,

... the cylinder, each of sinusoidal shape with height $\unicode[STIX]{x1D716}$ , invariant in the spanwise direction. Based on the two parameters, $\unicode[STIX]{x1D716}/D$ and the Reynolds number $Re_{D}=U_{\infty }D/\unicode[STIX]{x1D708}$ where $U_{\infty }$ is the free- ... velocity, $D$ the diameter of the cylinder and $\unicode[STIX]{x1D708}$ the kinematic viscosity, two main sets of simulations are described. The first set varies $\unicode[STIX]{x1D716}/D$ from $0$ to $1/32$ ... C_{p}$ , the skin-friction coefficient $C_{f\unicode[STIX]{x1D703}}$ and the non-dimensional pressure gradient ...

Tópico(s): Wind and Air Flow Studies

2017 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Acesso aberto Revisado por pares

Julio Delgado, Michael Ruzhansky,

... for smooth symbols are formulated using $\mathscr{S}_{\unicode[STIX]{x1D70C},\unicode[STIX]{x1D6FF}}^{m}(G)$ classes which are a suitable extension of the well-known $(\unicode[STIX]{x1D70C},\unicode[STIX]{x1D6FF})$ ones on the Euclidean space. The ... results have immediate consequences on general manifolds for $\unicode[STIX]{x1D70C}>\max \{\unicode[STIX]{x1D6FF},1-\unicode[STIX]{x1D6FF}\}$ , our results do not require the condition $\unicode[STIX]{x1D70C}>1-\unicode[STIX]{x1D6FF}$ . Moreover, one of our results also ...

Tópico(s): Advanced Mathematical Physics Problems

2017 - Cambridge University Press | Journal of the Institute of Mathematics of Jussieu

Artigo Revisado por pares

Akshay Sridhar, D. I. Pullin, Wan Cheng,

... friction velocity $U_{\infty }^{+}\equiv U_{\infty }/u_{\unicode[STIX]{x1D70F}}$ , are streamwise constant. For $Re_{x}$ ... must be the linear form $k_{s}(x)=\unicode[STIX]{x1D6FC}x$ , where $x$ is the distance from the boundary layer of zero thickness and $\unicode[STIX]{x1D6FC}$ is a dimensionless constant. This is shown to give a two-parameter $(m,\unicode[STIX]{x1D6FC})$ family of solutions, for which $U_{\ ... in the streamwise direction with similarity variable $z/(\unicode[STIX]{x1D6FC}x)$ , where $z$ is the wall- ... Results from this model over a range of $\unicode[STIX]{x1D6FC}$ are discussed for several cases, including ...

Tópico(s): Wind and Air Flow Studies

2017 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Revisado por pares

L. Djenidi, N. Lefeuvre, Md. Kamruzzaman, R. A. Antonia,

... dimensional mean turbulent kinetic energy dissipation rate $C_{\unicode[STIX]{x1D716}}=\overline{\unicode[STIX]{x1D716}}L/u^{\prime 3}$ (where $\unicode[STIX]{x1D716}$ is the mean turbulent kinetic energy ... is investigated in decaying turbulence. Expressions for $C_{\unicode[STIX]{x1D716}}$ in homogeneous isotropic turbulent (HIT), as ... evolves in compliance with self-preservation (SP), $C_{\unicode[STIX]{x1D716}}$ remains constant for a given flow ... which does comply with SP, show that $C_{\unicode[STIX]{x1D716}}$ decreases in the former case and ...

Tópico(s): Combustion and flame dynamics

2017 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Revisado por pares

Alexander Z. Zinchenko, Robert H. Davis,

... One base flow is planar extension (PE) ( $\dot{\unicode[STIX]{x1D6E4}}x_{1},-\dot{\unicode[STIX]{x1D6E4}}x_{2},0$ ), the other one is planar mixed flow (PM) ( $\dot{\unicode[STIX]{x1D6FE}}x_{2}$ , $\dot{\unicode[STIX]{x1D6FE}}\unicode[STIX]{x1D712}x_{1}$ , 0) with $\unicode[STIX]{x1D712}=0.16$ . A small but finite $\unicode[STIX]{x1D712}$ (a precise choice in the range $\unicode[STIX]{x1D712}\sim 0.1$ is unimportant) provides ... Ca$ and small drop-to-medium viscosity ratios $\unicode[STIX]{x1D706}$ . The database rheological functions are obtained ...

Tópico(s): Surfactants and Colloidal Systems

2017 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Revisado por pares

Dheeraj Varma, Manikandan Mathur,

... m}$ and $k_{n}$ ) at a fixed frequency $\unicode[STIX]{x1D714}$ results in two different terms in ... solution: (i) a superharmonic wave of frequency $2\unicode[STIX]{x1D714}$ , horizontal wavenumber $k_{m}+k_{n}$ ... is infinitely large along specific curves on the $(\unicode[STIX]{x1D714}/N_{0},f/\unicode[STIX]{x1D714})$ plane, where $N_{0}$ and $f$ ... stratifications, a unique divergence curve occurs on the $(\unicode[STIX]{x1D714}/N_{0},f/\unicode[STIX]{x1D714})$ plane for those $(m,n\neq ... can result in multiple divergence curves on the $(\unicode[STIX]{x1D714}/N_{0},f/\unicode[STIX]{x1D714})$ ...

Tópico(s): Tropical and Extratropical Cyclones Research

2017 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Revisado por pares

Yang Zhang, Quan Zhou, Chao Sun,

We investigate the statistical properties of the kinetic $\unicode[STIX]{x1D700}_{u}$ and thermal $\unicode[STIX]{x1D700}_{\unicode[STIX]{x1D703}}$ energy dissipation rates in two-dimensional ( ... Our results show that the ensemble averages $\langle \unicode[STIX]{x1D700}_{u}\rangle _{V,t}$ and $\langle \unicode[STIX]{x1D700}_{\unicode[STIX]{x1D703}}\rangle _{V,t}$ scale as $Ra^{- ... total dissipations, our results further reveal that $\langle \unicode[STIX]{x1D700}_{u}\rangle _{V,t}$ and $\langle \unicode[STIX]{x1D700}_{\unicode[STIX]{x1D703}}\rangle _{V,t}$ ...

Tópico(s): Combustion and flame dynamics

2017 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Acesso aberto Revisado por pares

Sathish K. P. Sanjeevi, Johan T. Padding,

... We compute the mean drag coefficient $C_{D,\unicode[STIX]{x1D719}}$ at different incident angles $\unicode[STIX]{x1D719}$ for a wide range of Reynolds ... that the sine-squared drag law $C_{D,\unicode[STIX]{x1D719}}=C_{D,\unicode[STIX]{x1D719}=0^{\circ }}+(C_{D,\unicode[STIX]{x1D719}=90^{\circ }}-C_{D,\unicode[STIX]{x1D719}=0^{\circ }})\sin ^{2}\unicode[STIX]{x1D719}$ holds up to large Reynolds numbers, $\ ... is possible to perform just two simulations at $\unicode[STIX]{x1D719}=0^{\circ }$ and $\unicode[STIX]{x1D719}=90^{\circ }$ for a given $\mathit{ ...

Tópico(s): Aerosol Filtration and Electrostatic Precipitation

2017 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Revisado por pares

Marius Ungarish,

... state gravity current of height $h$ and density $\unicode[STIX]{x1D70C}_{1}$ that propagates into an ambient motionless fluid of height $H$ and density $\unicode[STIX]{x1D70C}_{2}$ with an upper surface open ... with speed $U$ and causes a depth decrease $\unicode[STIX]{x1D712}$ of the top surface. This is ... 248) seminal solution for a fixed-top channel ( $\unicode[STIX]{x1D712}=0$ ). In the present case, the determination of $\unicode[STIX]{x1D712}$ is part of the problem. The ... the problem are $a=h/H$ and $r=\unicode[STIX]{x1D70C}_{2}/\unicode[STIX]{x1D70C}_{1}$ . We ...

Tópico(s): Hydrology and Sediment Transport Processes

2017 - Cambridge University Press | Journal of Fluid Mechanics

Artigo Acesso aberto Revisado por pares

Peter Burton,

... the structure of the quotient $\text{A}_{{\sim}}(\unicode[STIX]{x1D6E4},X,\unicode[STIX]{x1D707})$ of the space of measure-preserving ... the convex combination operation on $\text{A}_{{\sim}}(\unicode[STIX]{x1D6E4},X,\unicode[STIX]{x1D707})$ . This formalism allows us to define ... also discuss a topology on $\text{A}_{{\sim}}(\unicode[STIX]{x1D6E4},X,\unicode[STIX]{x1D707})$ due to Abért and Elek in ... that the convex structure of $\text{A}_{{\sim}}(\unicode[STIX]{x1D6E4},X,\unicode[STIX]{x1D707})$ is compatible with the topology, and ...

Tópico(s): Mathematical Dynamics and Fractals

2017 - Cambridge University Press | Ergodic Theory and Dynamical Systems

Artigo Acesso aberto Revisado por pares

Gerrit E. Elsinga, Takashi Ishihara, Manu Goudar, Carlos B. da Silva, J. C. R. Hunt,

... turbulence over a Reynolds number range from $Re_{\unicode[STIX]{x1D706}}=34.6$ up to 1131, and ... whose dimensions scale with the Kolmogorov length scale, $\unicode[STIX]{x1D702}$ . The vorticity stretching motions scale with the Taylor length scale, $\unicode[STIX]{x1D706}_{T}$ , while the flow outside the ... of this characteristic small-scale structure is $120\unicode[STIX]{x1D702}$ in all directions based on the ... vorticity stretching motions on the scale of $4\unicode[STIX]{x1D706}_{T}$ shows that transitions in flow ...

Tópico(s): Plant Water Relations and Carbon Dynamics

2017 - Cambridge University Press | Journal of Fluid Mechanics