The direct numerical simulation database from Shin et al. ( J. Fluid Mech. , vol. 823, 2017, pp. 1–25) is used to study three-dimensional vortical and very-large-scale coherent structures in a turbulent round jet at Reynolds number of $7300$ . In particular, horseshoe vortices their role the formation near intermediate fields are assessed. swirling strength criterion together with conditional a...

Carbon nanotubes (CNTs) are specific structures with valuable characteristics. In general, the structure of each nanotube is defined by a unique chiral vector. In this paper, different structures of short single-walled CNTs are simulated and their mechanical properties are determined using finite element method. For this aim, a simple algorithm is presented which is able to model the geometry o...