Mathematical modeling of particle movement in laminar flow in a pipe

The article provides basic information about the principles of calculations for solving the system of Navier–Stokes equations using the control volume method. The calculation of the incompressible fluid velocity field and pressure is found using the SIMPLE algorithm and MacCormack method. Particle trajectories were determined using the Lagrangian approach

Crack resistance of bent concrete structures with fiberglass reinforcement

This article presents experimental data on the appearance and development of normal and oblique cracks in relation to the longitudinal axis of the element under the influence of transverse loads on bending concrete beams equipped with shishaplastic Composite fittings made of ordinary heavy concrete

Capillary permeability of concrete in aggressive dry hot climate

The article presents the results of studies carried out to determine the capillary absorption (Wsuc) of a saline solution during evaporation and to establish a cyclic temperature regime. It has been established that for a reliable assessment of the capillary permeability of concrete in a dry hot climate, it is sufficient to subject the samples to 60 cycles of preliminary alternating heating and cooling, followed by testing in a climatic chamber for capillary absorption of a salt solution at a temperature of 40 °C and a relative humidity of 30%

Mathematical modeling of particle movement in laminar flow in a pipe

The article provides basic information about the principles of calculations for solving the system of Navier–Stokes equations using the control volume method. The calculation of the incompressible fluid velocity field and pressure is found using the SIMPLE algorithm and MacCormack method. Particle trajectories were determined using the Lagrangian approach

Flow trajectory analysis and velocity coefficients for fluid dynamics in tubes and holes

The article is devoted to determining the values of the flow trajectory of the water flowing through various tubes and holes depending on the pressure in front of the hole, and the flow rate coefficient is determined based on the flow parameters. Using the value of the velocity coefficients, the velocity and the force generated as a result of the velocity, the condition of the flow trajectory and the effect of the flow on various obstacles are determined