In the context of transition analysis, linear input-output analysis determines worst-case disturbances to a laminar base flow based on generic right-hand-side volumetric/boundary forcing term. The is not physically realizable, and, our knowledge, framework for posing physically-realizable disturbance problems lacking. natural receptivity are forced by matching (typically local) solutions within...

Abstract Reconstruction of unsteady vortical flow fields from limited sensor measurements is challenging. We develop machine learning methods to reconstruct features sparse during transient vortex–airfoil wake interaction using only a amount training data. The present models accurately the aerodynamic force coefficients, pressure distributions over airfoil surface, and two-dimensional vorticity...

Vortex Generators (VGs) are applied before the expected region of separation boundary layer in order to delay or remove flow separation. Although their height is usually similar that layer, some applications, lower VGs used, Sub-Boundary Layer (SBVGs), since this reduces drag coefficient. Numerical simulations sub-boundary vane-type vortex generators on a flat plate negligible pressure gradient...

The chiral vortical effect is a anomaly-induced transport phenomenon characterized by an axial current in uniformly rotating fluid. It well understood for Weyl fermions high energy physics, but its realization condensed matter band structures, including those of semimetals, has been controversial. In this work, we develop the Kubo response theory electrons general structure subject to space- an...

We revisit evaluation of the chiral vortical effect in accelerated matter. To first order acceleration corresponding matrix element axial current can be reconstructed from its flat-space limit. A crucial point is existence an extra conservation law fluid helicity which not related to symmetry Lagrangian. As a result, one reproduce, via equivalence principle, so-called gravimagnetic anomaly; res...

We consider the photonic vortical effect, i.e., difference of flows left- and right-handed photons along vector angular velocity in rotating medium. Two alternative frameworks to evaluate effect are considered, both which have already been tried literature: first, standard thermal field theory and, alternatively, Hawking-radiation-type derivation. In our earlier attempt compare two approaches, ...

In order to increase containment efficiency and reduce energy consumption, an inclined quad-vortex range hood (IQV range hood) was developed and tested by experimental methods. The flow structure was observed by a laser-assisted flow visualization technique and laser Doppler velocimetry (LDV). Leakage characteristics were measured by the tracer gas (sulfur hexafluoride) detection method. By arr...