The space–time CESE method applied to phase transition of water vapor in compressible flows

2007 ◽  
Vol 36 (7) ◽  
pp. 1247-1258 ◽  
Author(s):  
Xisheng Luo ◽  
Meili Wang ◽  
Jiming Yang ◽  
Ge Wang
Keyword(s):  
Phase Transition ◽  
Water Vapor ◽  
Compressible Flows ◽  
Space Time

Extended Discontinuous Galerkin Method for Solving Gas-Liquid Compressible Flows with Phase Transition

2020 ◽  
Author(s):  
David Henneaux ◽  
Pierre Schrooyen ◽  
Bruno Ricardo Barros Dias ◽  
Alessandro Turchi ◽  
Philippe Chatelain ◽  
...  
Keyword(s):  
Phase Transition ◽  
Galerkin Method ◽  
Discontinuous Galerkin ◽  
Discontinuous Galerkin Method ◽  
Compressible Flows

Discrete Bubble Modeling of Unsteady Cavitating Flow

2006 ◽  
Author(s):  
Zhiliang Xu ◽  
Roman Samulyak ◽  
James Glimm ◽  
Xiaolin Li
Keyword(s):  
Phase Transition ◽  
Numerical Solution ◽  
Phase Boundary ◽  
Vapor Bubble ◽  
Compressible Flows ◽  
Liquid Mixture ◽  
Cavitating Flows ◽  
Pure Phase ◽  
Free Interfaces ◽  
Unsteady Cavitating Flow

A discrete vapor bubble model is developed to simulate the unsteady cavitating flows. The mixed vapor-liquid mixture is modeled as a system of pure phase domains (vapor and liquid) separated by free interfaces. On the phase boundary, a numerical solution for the phase transition is developed for compressible flows.

scholarly journals Phase Transition and Entropy Force between Two Horizons in (n+2)-Dimensional de Sitter Space

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Yang Zhang ◽  
Wen-qi Wang ◽  
Yu-bo Ma ◽  
Jun Wang
Keyword(s):  
Phase Transition ◽  
Black Holes ◽  
Physical Mechanism ◽  
De Sitter Space ◽  
Space Time ◽  
Thermodynamic Quantities ◽  
De Sitter ◽  
Time Dimension ◽  
Cosmic Expansion

In this paper, the effect of the space-time dimension on effective thermodynamic quantities in (n+2)-dimensional Reissner-Nordstrom-de Sitter space has been studied. Based on derived effective thermodynamic quantities, conditions for the phase transition are obtained. The result shows that the accelerating cosmic expansion can be attained by the entropy force arisen from the interaction between horizons of black holes and our universe, which provides a possible way to explain the physical mechanism for the accelerating cosmic expansion.

scholarly journals Phase Transition at the Metric Elastic Universe

1996 ◽  
Vol 168 ◽  
pp. 569-570
Author(s):  
Alexander Gusev
Keyword(s):  
Phase Transition ◽  
Constitutive Relations ◽  
Three Dimensional ◽  
Vacuum State ◽  
Space Time ◽  
Deformation Tensor ◽  
De Sitter ◽  
Initial State ◽  
Deformation State ◽  
The Universe

At the last time the concept of the curved space-time as the some medium with stress tensor σαβon the right part of Einstein equation is extensively studied in the frame of the Sakharov - Wheeler metric elasticity(Sakharov (1967), Wheeler (1970)). The physical cosmology pre- dicts a different phase transitions (Linde (1990), Guth (1991)). In the frame of Relativistic Theory of Finite Deformations (RTFD) (Gusev (1986)) the transition from the initial stateof the Universe (Minkowskian's vacuum, quasi-vacuum(Gliner (1965), Zel'dovich (1968)) to the final stateof the Universe(Friedmann space, de Sitter space) has the form of phase transition(Gusev (1989) which is connected with different space-time symmetry of the initial and final states of Universe(from the point of view of isometric groupGnof space). In the RTFD (Gusev (1983), Gusev (1989)) the space-time is described by deformation tensorof the three-dimensional surfaces, and the Einstein's equations are viewed as the constitutive relations between the deformations ∊αβand stresses σαβ. The vacuum state of Universe have the visible zero physical characteristics and one is unsteady relatively quantum and topological deformations (Gunzig & Nardone (1989), Guth (1991)). Deformations of vacuum state, identifying with empty Mikowskian's space are described the deformations tensor ∊αβ, wherethe metrical tensor of deformation state of 3-geometry on the hypersurface, which is ortogonaled to the four-velocityis the 3 -geometry of initial state,is a projection tensor.

High Temperature Hydro Corrosion Resistance of Silica Based Oxide Ceramics

2003 ◽  
Author(s):  
Shunkichi Ueno ◽  
Naoki Kondo ◽  
D. Doni Jayaseelan ◽  
Tatsuki Ohji ◽  
Shuzo Kanzaki
Keyword(s):  
Phase Transition ◽  
Corrosion Resistance ◽  
Surface Layer ◽  
Water Vapor ◽  
High Temperature ◽  
Corrosion Test ◽  
Oxide Ceramics ◽  
Rich Phase ◽  
Water Vapor Corrosion ◽  
Phase Phase

Water vapor corrosion behavior of Ln2Si2O7 (Ln = Nd, Er, Lu), mullite, CaYb4Si3O13 and Al2O3 were investigated at 1500°C. In Ln2Si2O7 phases, Ln = Nd and Er samples were completely dissolved in water vapor environment. CaYb4Si3O13 phase underwent decomposition during the corrosion test. Lu2Si2O7 and mullite showed excellent water vapor corrosion protection. In the case of mullite, Al2O3 rich phase was formed on the surface and the corrosion progression was successfully protected. In the case of Lu2Si2O7 phase, phase transition occurred and the grain boundaries of surface layer were slightly corroded by the corrosion test.

scholarly journals PHASE STRUCTURE OF FOUR-FERMION THEORIES AT FINITE TEMPERATURE AND CHEMICAL POTENTIAL IN ARBITRARY DIMENSIONS

1995 ◽  
Vol 10 (15) ◽  
pp. 2241-2268 ◽  
Author(s):  
T. INAGAKI ◽  
T. KOUNO ◽  
T. MUTA
Keyword(s):  
Phase Transition ◽  
Order Phase Transition ◽  
Phase Structure ◽  
Chemical Potential ◽  
Expansion Method ◽  
Space Time ◽  
Second Order ◽  
Time Dimension ◽  
Arbitrary Space ◽  
Second Order Phase Transition

The phase structure of four-fermion theories is thoroughly investigated with varying temperature and chemical potential for arbitrary space-time dimensions (2≤D<4) by using the 1/N expansion method. It is shown that the chiral symmetry is restored in the theory under consideration for sufficiently high temperature and/or chemical potential. The critical line dividing the symmetric and the broken phase is given explicitly. It is found that for space-time dimension 2≤D<3 both the first order and the second order phase transition occur depending on the value of the temperature and chemical potential while for 3≤D<4 only the second order phase transition exists.

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