真空中范德华气体膨胀下热力学第二定律的表观违反

范德瓦尔斯力对管内液膜不稳定性的影响

Influence of van der Waals forces on the instability of a liquid film in a tube

研究通过线性稳定性分析揭示范德瓦尔斯力增强扰动增长、降低主导波长及减少临界液膜厚度的作用，同时通过数值模拟验证并扩展至非线性区域，发现其改变界面形态并抑制卫星丘形成。

Suppression of electroconvection due to van der Waals attraction of polymer additives towards the metal electrode

Electroconvection in rechargeable batteries enhances the growth of dendrites at the electrode surface. The addition of low molecular weight polymers to the electrolyte in batteries results in the formation of a thin layer of higher polymer concentration near the electrode. This is due to van der Waals forces of attraction between the metal electrode and the polymers dissolved in the electrolyte. The van der Waals forces act as a restoring body force on the electrolyte and oppose the growth of perturbations. Using linear stability analysis, we show that this force opposes electroconvective flow…

Direct van der Waals simulation (DVS) of phase-transforming fluids

We present the method of Direct van der Waals simulation (DVS) to study computationally flows with liquid-vapor phase transformations. Our approach is based on a novel discretization of the Navier-Stokes-Korteweg equations, that couple flow dynamics with van der Waals' non-equilibrium thermodynamic theory of phase transformations, and opens an opportunity for first-principles simulation of a wide range of boiling and cavitating flows. The proposed algorithm enables unprecedented simulations of the Navier-Stokes-Korteweg equations involving cavitating flows at strongly under-critical conditions…

Van der Waals shock polars with multiple or supersonic critical points

It is shown that the $γ$-van der Waals equation of state (eos) permits shock polars with supersonic critical points, corresponding to critical or strong-type shock reflections that are supersonic, which is not possible for ideal gas. It is also shown that general van der Waals eos permit polars with multiple critical points, corresponding to four or more reflected shocks for same deflection angle. Of these reflected shocks at least two are weak-type, i.e.\ deflection angle increasing with increasing shock strength, so that standard literature has no criteria to select one of the two. Both phen…

Van der Waals Cascade in Supercritical Turbulence near a Critical Point

We investigate a quite strong turbulence in a supercritical fluid near a gas-liquid critical point. Specifically, we consider a case in which the Kolmogorov scale is much smaller than the equilibrium correlation length $ξ$. Although equilibrium critical fluctuations are destroyed by turbulence, $ξ$ still provides a crossover length scale between two types of energy cascade. At scales much larger than $ξ$, the Richardson cascade becomes dominant, whereas at scales much smaller than $ξ$, another type of cascade, which we call the van der Waals cascade, is induced by density fluctuations. Experim…

范德瓦尔斯流体中的热对流

Thermal convection in the van der Waals fluid

本文研究了范德瓦尔斯流体模型在液-气两相流中的数值模拟，分析其热力学性质，并通过熵稳定方案和等几何分析验证了模型在描述相变和沸腾过程中的有效性。