Speaker
Dr
Kiril Shterev
(Institute of Mechanics - BAS)
Description
Rapidly emerging micro-electro-mechanical devices create new potential microfluidic applications. Fluid flow regime is important for their design. For a gas flow the transition between steady and unsteady regimes occurs at small Knudsen number Kn < 0.1 (Kn = l0 / L, where l0 is the mean free path of the gas molecules and L is the characteristic length). A continuum approach based on the Navier-Stokes-Fourier equations is applicable for this investigation. On the other the microfluidic application requires the problem to be investigated starting at very low Mach numbers (M=0.1), close to incompressible regime. This makes pressure based methods very suitable for this investigation. The system of Navier-Stokes-Fourier equations is calculated numerically using pressure based algorithm SIMPLE-TS 2D. The results are validated by comparison to data obtained by using molecular approach (direct simulation Monte Carlo (DSMC) method).
Primary authors
Dr
Kiril Shterev
(Institute of Mechanics - BAS)
Prof.
Stefan Stefanov
(Institute of Mechanics - BAS)
