The separation process of oily water using membranes has attracted the attention researchers and engineers. greater problem in use membrane is reduction permeate flux due to clogged pores by oil deposition inside or effect concentration polarization. For this purpose, a theoretical study water/oil module was performed. This device consists tubular ceramic provided with rectangular inlet section...

In single-bend channels or meandering channels, groynes are widely used as a river-training structure. Geometric factor is an important principle of groyne design. this paper, the numerical method based on Renormalization Group (RNG) k-ε turbulence model to study effects with different lengths and orientations mean flow pattern characteristics in mildly channel. The analysis shows that compared...

This study investigates the effects of elbow on transition and development multiphase flow using computational fluid dynamics modelling techniques. The Eulerian - Multifluid VOF model coupled with an Interfacial Area Transport Equation has been employed to simulate air-water two-phase in a pipe two standard 90 degree elbows mounted series. Turbulence were accounted for by RNG k-ε model. separat...

For simplicity, we adopt the following rules: X denotes a non empty set, F denotes a sequence of partial functions from X into R with the same dom, s1, s2, s3 denote sequences of extended reals, x denotes an element of X, a, r denote extended real numbers, and n, m, k denote natural numbers. We now state several propositions: (1) If for every natural number n holds s2(n) ≤ s3(n), then inf rng s...

ABSTRACT The flow of air past a smooth surface-mounted hemisphere is investigated numerically using six common RANS turbulence models and seeking steady solutions. Where possible, the are applied standard wall functions, resolving viscous sublayer, enhanced treatment option in ANSYS Fluent. Results simulations compared against measurements taken wind tunnel experiment. comparison shows that bou...

The Standard Model (SM) prediction for the ratio ε′/ε appears to be significantly below the experimental data. Also εK in the SM tends to be below the data. Any new physics (NP) removing these anomalies will first of all have impact on flavour observables in the K meson system, in particular on rare decays K+ → π+νν̄, KL → π0νν̄, KL → μ+μ− and KL → π0`+`− and ∆MK . Restricting the operators contr...

Sensitivity measurements performed on EVLA antenna #14 show that the cold-sky zenith system temperature is about 45K for the 18 – 26 GHz band, and 60 K for the low frequency end of the 40 – 50 GHz band, rising to 95 K at the high frequency end. Efficiency measurements based on the planet Venus show the antenna efficiency to be about 50% in the 18 – 26 GHz band, and about 28% for the 40 – 50 GHz...