The speed of pulled fronts for parabolic fractional-reaction-dispersal equations is derived and analyzed. From the continuous-time random walk theory we derive these equations by considering long-tailed distributions for waiting times and dispersal distances. For both cases we obtain the...

Front solutions in a reaction–diffusion equations with cutoff are obtained analytically using piecewise linear approximations of the reaction term. The piecewise emulation allows us to study analytically the effect of the cutoff for fronts propagating into metastable and unstable states. A...

The effect of the delay time on the speed of wave fronts for interacting–diffusing models is studied analytically and numerically, both for predator–prey and competition models. It is shown that the interaction parameters may be evaluated from the time during which both species coexist until...

We consider a two-component system of reaction-diffusion equations with a small cutoff in the reaction term. A semi-analytical solution of fronts and how the front velocities vary with the parameters are given for the case when the system has a piecewise linear nonlinearity. We find the...

Interfacial immiscible fluid systems with hydrodynamic spin are studied within the framework of non-equilibrium thermodynamics. The energy and entropy densities and the momentum, internal angular momentum and heat currents are allowed to be singular at the interface. Balance equations in the...

A method of induced forces and torques is employed to study brownian motion of a particle in a fluid with internal angular momentum (spin). One derives generalized Faxén theorems for the force and torque exerted on the particle. In the Landau-Lifshitz approach, one obtains...

It is shown that the identification of the Lagrange multiplier conjugated to the viscous pressure tensor that was proposed in a previous paper [Physica A 233 (1996) 163–174] on information theory applied to fluids under flow yields for the orientational distribution function of dilute dumbbell...

Previous thermodynamic analyses of shear-induced shift of the spinodal line in diluted polymer solutions in plane Couette flows are extended here to the entangled regime by using the reptation model. The most significant difference with respect to the dilute regime is a shift of the critical...

The expressions for the nonequilibrium temperature derived from the fluctuation–dissipation theorem and from the differential of the informational nonequilibrium entropy for ideal gases under shear flow are compared. Both temperatures are different, in particular, the thermodynamic temperature...