Numerical Method for Large-Density-Gradient Flow Fields.

A Mass Conservative Method for Numerical Modeling of Axisymmetric flow

In this paper, the cell-centered finite volume method (CC-FVM) has been presented to simulate the axisymmetric radial flow toward a pumping well. The model is applied to the unstructured triangular grids which allows to simulate inhomogeneous and complex-shaped domains. Due to the non-orthogonality of the irregular grids, the multipoint flux approximation (MPFA) methods are used to discretize t...

A quick and large-scale density gradient subfractionation method for low density lipoproteins.

A quick density gradient-banding subfractionation method has been developed for d < 1.063 g/ml lipoproteins. Up to 324 ml of plasma can be resolved into five distinct layers by a single ultracentrifugation. The separation was achieved with a discontinuous density gradient formed between plasma and a layer of NaCl solution of d 1.080 g/ml in an angle-head rotor during centrifugation at 45,000 rp...

Global conjugate gradient method for solving large general Sylvester matrix equation

In this paper, an iterative method is proposed for solving large general Sylvester matrix equation $AXB+CXD = E$, where $A in R^{ntimes n}$ , $C in R^{ntimes n}$ , $B in R^{stimes s}$ and  $D in R^{stimes s}$ are given matrices and $X in R^{stimes s}$  is the unknown matrix. We present a global conjugate gradient (GL-CG) algo- rithm for solving linear system of equations with multiple right-han...

A numerical method for a second-gradient theory of incompressible fluid flow

This work concerns the development of a finite-element method for discretizing a recent second-gradient theory for the flow of incompressible fluids. The new theory gives rise to a flow equation involving higher-order gradients of the velocity field and introduces an accompanying length scale and boundary conditions. Finite-element methods based on similar equations involving fourth-order diffe...

Numerical Study of Non - Equilibrium Air Dissociation For Calculation of Electron Density in Hypersonic Flow