15,987 research outputs found
Divergence Behavior of Thermodynamic Curvature Scalar at Critical Point in the Extended Phase Space of Generic Black Holes
The - phase transition and critical behavior in the extended phase
space of asymptotic Anti-de Sitter (AdS) black holes have been widely
investigated, in which four critical exponents around critical point are found
to be consistent with values in the mean field theory. Recently, another
critical exponent related to divergent correlation length at critical
point is proposed by using thermodynamic curvature scalar in the charged
AdS black hole. In this paper, we develop a method to investigate the divergent
behavior of at critical point, and find that the divergent behavior of
around the critical point expresses a universal property in generic black
holes. We further directly apply this method to investigate black holes in de
Rham-Gabadadze-Tolley (dRGT) massive gravity to check this universality. Those
results shed new lights on the microscopic properties of black holes.Comment: 10 pages, no figure, version accepted by PL
Recommended from our members
An unprecedented 2D covalent organic framework with an htb net topology.
A 2D imine-linked COF with a hitherto unreported htb type topology was synthesized from a linear diamine linker and a judiciously designed tetra-aldehyde building block. This work opens the door to the development of COFs with unprecedented topologies and may broaden the scope of COF functional materials by pore size and pore surface engineering
Solving second kind integral equations by Galerkin methods with continuous orthogonal wavelets
AbstractIn this paper, We use the continuous wavelets on the interval constructed by Cohen et al. (Appl. Comput. Harm. Anal. 1 (1993) 54–81) to solve the second kind integral equations. To this end, we give the decomposition and reconstruction algorithm for these wavelets, and construct the quadrature formulae for the calculation of inner products of any functions and the scaling functions, which are required in the wavelet-Galerkin methods for integral equations. In this method, the integral kernels are represented in these wavelet bases as sparse matrices, to high precision. Thus, we present an efficient algorithm for numerical solution of second kind integral equations
Macrophage migration inhibitory factor (MIF) family in arthropods : Cloning and expression analysis of two MIF and one D-dopachrome tautomerase (DDT) homologues in Mud crabs, Scylla paramamosain
Acknowledgements This research was supported by grants from the National Natural Science Foundation of China (Nos. 31172438 and U1205123), the Natural Science Foundation of Fujian Province (No. 2012J06008 and 201311180002) and the projects-sponsored by SRF. TW received funding from the MASTS pooling initiative (The Marine Alliance for Science and Technology for Scotland) funded by the Scottish Funding Council (grant reference HR09011) and contributing institutions.Peer reviewedPostprin
The Effects Of Surface Characteristics On Liquid Behaviors Of Fins During Frosting And Defrosting Processes
Liquid behaviors, including droplet condensation and frost melt water retention, of fins during frosting and defrosting processes on three aluminum fins with different surface characteristics under winter operating conditions of an air source heat pump were investigated. The effects of the surface characteristics, including the contact angle and the contact angle hysteresis, were analyzed. Droplets were observed firstly on a bare fin and on a super hydrophobic fin last, and exhibited different sizes and shapes under the effects of the surface characteristics. The droplet distribution was sparser on the super hydrophobic fin than on the other two fins because of the consolidation, rolling and departure of droplets. There was an obvious difference on frost melt water retention between the three fins. Residual water formed a thin water film on a hydrophilic fin, while only a few spherical droplets of small sizes stayed on the super hydrophobic fin. The effects of the surface characteristics were found to be significant on the mass of residual water, which decreased by 79.82% on the super hydrophobic fin compared with that on the hydrophilic fin. Finally, the effects of the contact angle and the contact angle hysteresis on frost melt water retention were quantitatively analyzed. Results indicate that the super hydrophobic fin can restrain the droplet condensation and frost melt water retention
Parallel finite volume simulation of the spherical shell dynamo with pseudo-vacuum magnetic boundary conditions
In this paper, we study the parallel simulation of the magnetohydrodynamic
(MHD) dynamo in a rapidly rotating spherical shell with pseudo-vacuum magnetic
boundary conditions. A second-order finite volume scheme based on a collocated
quasi-uniform cubed-sphere grid is applied to the spatial discretization of the
MHD dynamo equations. To ensure the solenoidal condition of the magnetic field,
we adopt a widely-used approach whereby a pseudo-pressure is introduced into
the induction equation. The temporal integration is split by a second-order
approximate factorization approach, resulting in two linear algebraic systems
both solved by a preconditioned Krylov subspace iterative method. A multi-level
restricted additive Schwarz preconditioner based on domain decomposition and
multigrid method is then designed to improve the efficiency and scalability.
Accurate numerical solutions of two benchmark cases are obtained with our code,
comparable to the existing local method results. Several large-scale tests
performed on the Sunway TaihuLight supercomputer show good strong and weak
scalabilities and a noticeable improvement from the multi-level preconditioner
with up to 10368 processor cores
- …