The crystal structure of the low-temperature form II butamben has been solved in a P21/c space group very similar to that I. Form possesses virtually same packing as high-temperature I, and dimorphism is mainly represented by small discontinuous change size unit cell difference enthalpy. Because enthalpy between two polymorphs 375 J·mol–1, it will be difficult predict stability hierarchy comput...

We present numerical methods for the solution of the Stokes equations that handle interfacial discontinuities, discontinuous material properties and irregular domains. The discretization couples a Lagrangian representation of the material interface with Eulerian representations of the fluid velocity and pressure. The methods are efficient, easy to implement and yield discretely divergence-free ...

In this paper we formulate and test numerically a fully-coupled discontinuous Galerkin (DG) method for incompressible two-phase flow with discontinuous capillary pressure. The spatial discretization uses the symmetric interior penalty DG formulation with weighted averages and is based on a wetting-phase potential / capillary potential formulation of the twophase flow system. After discretizing ...

This paper introduces how green marketing influences the sustainable development of garment industry. It analyses the cost and profit to implement green marketing, both in a short term and in the long run. In a short term the cost may increase. However, in the long run, the income will overweigh the cost. There’re five reasons: reduced cost, expanding export by broking down green barriers, esta...

For Stokes equations with discontinuous viscosity across an arbitrary interface or/and singular forces along the interface, the pressure is known to be discontinuous and the velocity is known to be non-smooth. It has been shown that these discontinuities are coupled together which makes it difficult to obtain accurate numerical solutions. In this paper, a second order accurate numerical method ...

We propose a nonconforming finite element method for isentropic viscous gas flow in situations where convective effects may be neglected. We approximate the continuity equation by a piecewise constant discontinuous Galerkin method. The velocity (momentum) equation is approximated by a finite element method on div–curl form using the nonconforming Crouzeix– Raviart space. Our main result is that...

While the Marangoni-stress-driven spreading of surfactants along continuous fluid interfaces is a well-studied problem, we demonstrate experimentally that swift and efficient surfactant transport can also occur along discontinuous interfaces. We used chemical surface patterning to create arrays of discrete drops and liquid bridges immersed inside a second immiscible liquid. Surface-active compo...

The paper presents a mathematical model for vane-type air motors with arbitrary number of vanes. The paper starts from the working principles of the air motor and modeling approach. Then the mechanical geometry structure of air motors is analyzed in order to derive a generic mathematical description of the air motor. A complete dynamic process of the air motor system is derived based on the mec...

A novel numerical method for solving three-dimensional two phase flow problems is presented. This method combines a quadrature free discontinuous Galerkin method for the level set equation with a pressure stabilized finite element method for the Navier Stokes equations. The main challenge in the computation of such flows is the accurate evaluation of surface tension forces. This involves the co...