A compact (L ≈ 5 cm) spherical Fabry-Perot interferometer with adjustable mirror spacing is used to produce interference fringes with frequency separation (c/2L)/N , N 20. These fringes are used as frequency markers in a Doppler-free saturation spectroscopy experiment. The conditions for observation of the fringes are discussed in terms of the eigenmodes of the cavity with high transverse indic...

This paper implements the lattice Boltzmann method to simulate propagation of sound waves in three dimensions. The numerical model is exercised on lid-driven cavity flow. Tests are then proposed acoustic situations. results first confronted with analytical solutions spherical emitted by a single point source inside cubic cavity. Then, we studied case where from circular placed at center left bo...

The effects of the combined utilization wavy wall and different nanoparticle shapes in heat transfer fluid for a thermoelectric generator (TEG) mounted vented cavity are numerically analyzed. A triangular wave form is used, while spherical cylindrical-shaped alumina nanoparticles used water up to loading amount 0.03 as solid volume fraction. impacts amplitude on flow output power features signi...

Abstract The motion of a light spherical body in rotating tilted cylindrical cavity with liquid is studied experimentally. rotation rate and angle inclination the cuvette, viscosity characteristics vary. It shown that an increase cell rotation, velocity body’s ascent decreases. An cylinder relative to vertical also leads decrease body. A paradoxical behaviour demonstrated: liquid, increases whi...

A bstract We revisit the stability of black hole saddles for Euclidean path integral describing canonical partition function Z ( β ) gravity inside a spherical reflecting cavity. The boundary condition at cavity wall couples transverse-traceless (TT) and pure-trace modes that are traditionally used to describe fluctuations about Schwarzschild holes in infinite-volume asymptotically flat asymoto...