In this paper, a multi-grid solver for the discretisation of partial differential equations on complicated domains is developed. The algorithm requires as input the given discretisation only instead of a hierarchy of discretisations on coarser grids. Such auxiliary grids and discretisations are generated in a black-box fashion and are employed to define purely algebraic intergrid transfer opera...

Knowledge of the protein structure is considered a precondition for understanding their function. Crystallography remains the most powerful tool in that context, but crystal structure determination of macromolecules is often hampered by a lack of crystals suitable for diffraction. In our work, we have studied the crystallization of human serum albumin (HSA) and bovine beta-lactoglobulin (BLG) i...

In this paper, we propose a general approach for stabilizing the single layer potential for the Helmholtz boundary integral equation and prove its stability. We consider Galerkin boundary element discretizations and analyze their convergence. Furthermore, we derive quantitative error bounds for the Galerkin discretization which are explicit with respect to the mesh width and the wave number for...

An unsteady numerical simulation method was used in order to explore more efficient atomization methods for liquid fuel scramjet combustors and study the influence of different shock wave incident positions on characteristics kerosene crossflow. The wedge compression surface generate wave, position jet controlled by changing angle surface. inlet Mach number 2.01; total temperature 300 K, moment...

A new set of analytical formulae for calculating the bootstrap current and neoclassical conductivity in tokamak experiments is presented. Previous works comparing widely used Sauter model with results recently developed numerical solvers have shown to be inaccurate at higher collisionalities typical edge pedestals presence impurities. Thus, its applicability, particularly analysis highly intere...

The fluid dynamic (flow rates) and hydrodynamic behavior (local droplet size distributions local holdup) of a continuous DN300 pump-mixer were investigated using water as the phase paraffin oil dispersed phase. influence impeller speed (N = 375 to 425 rpm), feed ratio (φF 10 30 vol.-%), flow rate (V˙tot ≈ 0.5 2.3 L/min) by measuring pumping height, holdup disperse phase, distribution (DSD). lat...

The viscosity of adiponitrile waste liquid is as high 1000 cp. It challenging to spray and atomize the normally. Based on coaxial three-channel pneumatic atomizer, a two-stage supersonic steam atomizer proposed in this paper, atomization process simulated by Fluent software. Compared with traditional simulation method, Volume-of-Fluid Discrete-Phase-Model (VOF-DPM) bi-directional coupling model...

In this work, the GEneralised Multifluid Modelling Approach (GEMMA) is applied to simulation of liquid–liquid extraction in a Rotating Disc Column (RDC) and Pulsed Sieve-plate Extraction (PSEC). A mass transfer modelling methodology developed, which multiphase flows, droplet size distribution dispersed phase holdup predicted with computational fluid dynamics are coupled correlations predict ove...