The current empirical study was conducted to investigate the wall neighborhood impact on the two-dimensional flow structure and heat transfer enhancement behind a square cylinder. The low- velocity open-circle wind tunnel was used to carry out the study tests considering the cylinder diameter (D)-based Reynolds number (ReD) of 5130. The selected items to compare were different gap he...

Abstract In this paper, a novel ultra-thin and multi-band radar absorber structure using cylindrical frequency selective surfaces (FSS) is proposed. The unit cell of the consists curved square ring printed on dielectric spacer to realize strong resonance achieve efficient absorption incident microwave energy. use FSS coating results in considerable decrease cross section perfect electric cylind...

The exact solution is found for the Stefan problem of inwards freezing of a nonhomogeneous cylinder whose specific heat and latent heat depend upon the inverse square of the radial distance. The freezing time for the corresponding annular cylinder is found exactly. The validity of the pseudo-steady-state approximation for the solvable cylinder problem is verified explicitly. It is argued that t...

The aerodynamic properties of a two-dimensional cactus-shaped cylinder with four ribs are studied experimentally. cross section the corresponds to modified square rounded corners and concave sides inspired by tall succulents ribs. mean coefficients, fluctuating lift coefficient, Strouhal number, surface pressure distribution measured as function angular orientation for Reynolds numbers ranging ...

Fused silicon dioxide, multiparameter flow transducers with 50 microns internal square cross section and approximately 60 microns length can simultaneously measure DC and RF impedance as well as fluorescence and multiple-angle light scattering. A spherical version of such a transducer was mounted in an EPICS CVA flow-cell housing and was installed on a research prototype equipped with an argon-...