instabilities of a thin viscous film flowing down a uniformly heated plane are investigated in this study. the heating generates a surface tension gradient that induces thermocapillary stresses on the free surface. thus, the film is not only influenced by gravity and mean surface tension but also the thermocapillary force is acting on the free surface. moreover, the heat transfer at the free su...

Abstract This paper includes description of the technique that was applied for free-flight (drop) tests rocket-plane scaled model. The main aim experiment to validate numerical approach be used simulate gliding flight rocket-plane, especially transition between high low angles attack and response control. primary goal this is show what kind challenges must addressed when planning test campaign....

The determination of aerodynamic coefficients for complex high-speed vehicles still requires experimental measurement. This paper details the development free-flight measurement technique within University Oxford High Density Tunnel. In particular, a novel image processing is developed calculating position model from video. study focuses on high Reynolds number data subscale Skylon space plane ...

The interaction of steady free-surface flows viscoplastic material with a surface-piercing obstruction square cross-section on an inclined plane is investigated theoretically. flow thickness increases upstream the and decreases in its lee. depends two dimensionless parameters: aspect ratio that relates thickness, width inclination; Bingham number quantifies magnitude yield stress relative to gr...

We present a higher order stabilization-free virtual element method applied to plane elasticity problems. utilize serendipity approach reduce the total number of degrees freedom from corresponding high-order approximations. The well-posedness problem is numerically studied via an eigenanalysis. then several benchmark problems linear and we show that delivers optimal convergence rates in $L^2$ n...

background: in general, measurements of solar ultraviolet (uv) radiation are related to horizontal surfaces. while the hu­mans walking and standing outdoors expose to the natural solar uv radiation, their eyes, cheeks, extremities, trunks, or many other anatomical sites are close to vertical plane and random orient to different directions. in this study, we character­ized the diurnal variations...

It is proved that if G is a plane embedding of a K4-minor-free graph with maximum degree ∆, then G is entirely 7-choosable if ∆ ≤ 4 and G is entirely (∆+2)-choosable if ∆ ≥ 5; that is, if every vertex, edge and face of G is given a list of max{7,∆+2} colours, then every element can be given a colour from its list such that no two adjacent or incident elements are given the same colour. It is pr...