Probe the numerical stability of the method under dynamical conditions. KW - Lattice Boltzmann method, multicomponent flow, numerical stability, low viscosity. JO - Communications in Computational Physics T1 - Numerical Stability Analysis for a Stationary and Translating Droplet at Extremely Low Viscosity Values Using the Lattice Boltzmann Method Color-Gradient Multi-Component Model with Central Moments Formulation Probe the numerical stability of the method under dynamical = , on both the droplet and the ambient, is explored into the low viscosity regime, to The effects on numerical stability of applying a uniform acceleration in one direction on the domain, The effects of small- and large-scale anisotropy, due to grid-spacing andĭomain-size, respectively, are investigated for a stationary droplet. increasing resolution, in the extremely low viscosity regime for stationary droplet We focus on numerical stability and on the effect of decreasing grid-spacing, This method promises increased numerical stability with respect to the non-CM formulation. We perform a quantitative study and validations, varying parameters such as viscosity,ĭroplet radius, domain size and acceleration for stationary and translating droplet simulations for the color-gradient method with central moments (CG-CM) formulation, as Therefore do not allow exploration of physically relevant low viscosity regimes. In summary, a miniaturized viscometer was designed by integrating a GaN optical device with a bendable strip.

Yet many multicomponent models for LBM are limited in their numerical stability and Multicomponent flow simulations are useful for a wide range of applications, Have clear advantages with respect to other approaches, such as good parallel performances and scalability and the automatic resolution of breakup and coalescenceĮvents. The greater the resistance to flow, the higher the viscosity, so for example, syrup has a higher viscosity than water. It can also be thought of as a measure of a fluid’s thickness or its resistance to objects passing through it. And a 10W-30 will flow easier than a 15W-40 at normal engine operating temperatures. So a 5W-30 will flow easier than a 10W-30 at start-up temperatures.

The faster oil flows to critical parts of the engine, the more protected they are from wear. Multicomponent models based on the Lattice Boltzmann Method (LBM) Viscosity is a measure of a fluid’s resistance to flow. Thin, low viscosity oils flow easier to protect engine parts at cold temperatures.

Low viscosity