Wyniki wyszukiwania - BazTech

1

Transient flow through a porous channel with ramped pressure gradient and velocity slip boundary condition

Jha Basant K., Yunus Zainab Sa'id

International Journal of Applied Mechanics and Engineering

|

2022

|

Vol. 27, no. 1

78--90

EN

A transient flow formation of an incompressible fluid through a horizontal porous channel assuming a ramped pressure gradient is considered with the velocity slip boundary conditions. The flow is a laminar flow caused by ramped pressure gradient along the flow direction. The equation governing the flow is modeled, and solved by the Laplace transformation technique to obtain a semi-analytical solution under slip boundary conditions. It was noted that the flow velocity increases as the slip parameter is increased.

2

Numerical modeling of transient flows in load pipes with complex geometry

Ramoul S., Fourar A., Massouh F.

Journal of Applied Mathematics and Computational Mechanics

|

2017

|

Vol. 16, nr 4

67--78

EN

Changes in the system flow of a fluid in a pipe often cause sudden pressure changes and give rise to so-called transient load flows. So, the study of the phenomenon of transient load flows aims to determine whether the pressure in the whole of a system is within the prescribed limits, following a perturbation of the flow. By defining the scope of a water hammer study, an examination is made of variations in velocity or flow and pressure resulting from poor operation of the hydraulic system, its normal operation and emergency operations. This paper introduces a numerical modeling of the phenomenon of transient flows in load pipes with variable geometries which presents a study of the average pressure and the average velocity of the transient flow in the pipe with quasi-steady term friction. The characteristic method is used to solve the governing equations of “Saint-Venant”. Thanks to the AFT Impulse industrial program, we have obtained very interesting and very practical numerical results to describe the phenomenon of transient flows in variable load pipes.

3

Badania przyściennego przepływu przejściowego i burzliwego w mieszalniku cieczy. I. Pomiary anemometryczne

Zakrzewska B., Peryt S., Jaworski Z.

Inżynieria Chemiczna i Procesowa

|

2001

|

T. 22, z. 3

427-443

PL

Przedstawiono wyniki pomiarów składowych osiowej i stycznej prędkości cieczy w mieszalniku wyznaczone za pomocą dopplerowskiego anemometru laserowego (LDA). Badania wykonano w obszarze przyściennym w zakresie przepływu przejściowego (0,28% roztwór CMC i 75% roztwór gliceryny) i przepływu burzliwego (woda) w mieszalniku o średnicy D = 0,202 m zaopatrzonym w 4 płaskie przegrody i turbinę Rushtona lub mieszadło turbinowe o łopatkach nachylonych pod kątem 45 [stopni].

EN

Measurements of the axial and tangential components of fluid velocity obtained by means of an LDA system in a stirred tank have been presented. The study has been carried out in a wall jet region of a stirred tank within the transitional flow regime (0.28% CMC and 75% glycerol solutions) and in the turbulent (water). The tank has been equipped with 4 standard baffles, a Rushton turbine impeller or a 45 [degrees] pitched blade turbine impeller.