Results 261 to 270 of about 10,071,969 (331)

Experimental study of convective heat transfer in the entrance region of an annulus with an external grooved surface

Experimental Thermal and Fluid Science, 2018
The aim of this experimental work is to study the effect of grooved surfaces in the entrance region of annular flows on local heat transfer. The outer stationary cylinder is grooved and the inner rotating cylinder is smooth.
A. Nouri-Borujerdi, M. Nakhchi
semanticscholar   +1 more source

Developing blood flow in the entrance region of an artery

International Journal of Bio-Medical Computing, 1994
Presented herein are the studies of the flow behaviour of blood in the entrance region of a segment of an artery. The artery has an axisymmetric mild stenosis developed right from the entry cross section. The blood has been represented by a Bhingham fluid model which also takes the core region, formed due to axial migration of the red blood cells, into
P N, Tandon, L M, Srivastava, K, Kushwaha   +2 more
openaire   +2 more sources

Flow in the Entrance Region at Low Reynolds Numbers

Journal of Fluids Engineering, Transactions of the ASME, 1973
This work extends the application of the momentum integral method to entrance flow problems with axial transport of vorticity. Laminar flow development of an incompressible Newtonian fluid in the entrance region of a circular tube and a parallel-plate ...
R.-Y. Chen
exaly   +2 more sources

Flow development in entrance region of ducts

Communications in Numerical Methods in Engineering, 1993
AbstractThe integral transform method is used to compute numerically the development of the velocity profile in the hydrodynamic entrance region for laminar flow inside a parallel plate channel. The results have user‐prescribed accuracy and can be used to test other numerical methods.
Carvalho, T. M. B., Cotta, R. M., Mikhailov, M. D.   +2 more
openaire   +2 more sources

Laminar Flow in the Entrance Region of a Porous Pipe

The Physics of Fluids, 1959
The equation of motion for steady, incompressible, axially symmetric flow in a pipe with uniform wall suction or injection is expressed in terms of a ``dimensionless stream function,'' F(ζ, η) = ψ(x, r)/ψ(x, a), where ψ is the usual stream function, x and r are cylindrical polar coordinates, a is the radius of the pipe, ζ = 1 − [2Rx/(aN)], η = (r/a)2 ...
openaire   +2 more sources

Start‐up Flow in the Entrance Region of a Circular Tube

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 1971
AbstractEs wird die im Einlaufbereich eines kreisförmigen Rohres unter konstanter Druckhöhe plötzlich angefachte Bewegung einer ursprünglich ruhenden zähen, inkompressiblen Flüssigkeit untersucht. Dabei wird ein auf der numerischen Lösung der Impuls‐Integralgleichung beruhendes Verfahren benutzt.
Avula, X. J. R., Young, D. F.
openaire   +2 more sources

Flow in the entrance region of noncircular ducts

The Physics of Fluids, 1975
A remarkably simple method of solution is given for an eigenvalue problem arising in laminar flow in ducts which uses eigenfunctions of the Helmholtz equation. The only computation involved is the determination of zeros of a series to obtain the eigenvalues.
openaire   +2 more sources

Entrance region flow of polymer melts

AIChE Journal, 1971
AbstractAn experimental study has been made to investigate polymer melt flow in the entrance region of a circular tube. For the study, a capillary rheometer was used to measure wall normal stresses in polymer melts in the reservoir and along the axis of the capillary.
openaire   +1 more source

CFD simulation of hydrodynamics in the entrance region of a downer

Chemical Engineering Science, 2001
Abstract A gas turbulence–solid turbulence model ( k – e – Θ – k p ) was used to simulate the hydrodynamics in the entrance region of a downer. This model incorporates a k – e turbulence model for gas phase, a k p turbulence model and a kinetic theory description of solid stresses characterized by granular temperature ( Θ ) for solid ...
Yi Cheng, Fei Wei, Yincheng Guo, Yong Jin   +3 more
openaire   +1 more source

Turbulent Flow in the Entrance Region of a Pipe

Journal of Fluids Engineering, 1956
Abstract This paper presents an analytical solution for the turbulent boundary-layer flow in the entrance region of a pipe. The equations yield the relative momentum thickness at any station within ten diameters of the entrance, and from this the pressure drop and head loss are calculated.
openaire   +1 more source