The experimental study of the heat flow intensity a single-row horizontal air-cooled tubular bundle exchanger with spiral aluminum rolling fins at low Reynolds numbers (Re < 2000) is performed. geometrical dimensions bimetallic finned tubes bundle, following: outer diameter d = 56.0 mm; tube base 0 26.8 fin height h 14.6 pitch s 2.5 average thickness Δ 0.5 coefficient φ 19.3; transfer length...

A Grauert tube, or adapted complex structure, gives a canonical complexification of a real analytic Riemannian manifold defined on a neighborhood of the zero section of the (co-)tangent bundle. Such a tube is called entire if it is defined on the whole tangent bundle of the real analytic Riemannian manifold M, g. Very few examples of such entire tubes are known, but a general statement has prov...

The results of a comprehensive study on the charging and discharging latent heat storage systems (LHSS) are presented. Multi-tube shell-and-tube units with variable layouts tube bundles examined. Two arrangements—in-line staggered—are tested. A number tubes different positions in bundle investigated. Moreover, two pitch ratios studied. Three commercially available substances used as phase chang...

A high-order spectral difference (SD) method for solving the Navier-Stokes equations on moving, deformable unstructured grids has been developed [1]. In this paper, the SD method and the artificial compressibility method (ACM) are integrated with a dual time-stepping scheme to model unsteady incompressible viscous flow past an inline tube bundle of cylinders equally sized (diameter = d) and spa...

Bundle morphology and adsorptive contributions from nanotubes and impurities are studied both experimentally and by simulation using a computer-aided methodology, which employs a small physisorbed probe molecule to explore the porosity of nanotube samples. Grand canonical Monte Carlo simulation of nitrogen adsorption on localized sites of a bundle is carried out to predict adsorption in its acc...

Tube bundle recuperators are generally designed to operate with smooth tubes. Structured tubes can be used increase the efficiency of recuperators. Compared tubes, surface for heat transfer is increased and thus enhanced. This effect accompanied by an pressure loss, which must kept as low possible. Four tube geometries different honeycomb structures examined. The results compared performance a ...