Fluid flow in a pipe encounters frictional resistance due to the internal roughness (e) of the pipe wall, which can create local eddy currents within the fluid. Calculation of the Reynolds Number helps to determine if the flow in the pipe is Laminar Flow or Turbulent Flow. Pipes that have ...
This article describes the calculation of the minimum critical Reynolds number for laminar-turbulent transition in pipe flows. From the conclusions of our previous experimental study, it is clear that a transition occurs near the pipe inlet and the critical Reynolds number [R.sub.c] takes the min...
A conceptual model has been constructed for the problem of determining a critical Reynolds number (Re) for laminar-turbulent transition in pipe and channel flows. For pipe flow, the minimum critical Reynolds number Rc(min) of approximately 2040 was obtained. In order to prove the validity of ...
Can any one tell me, whether there is any way to find the Reynolds Number from CFX directly? If we have to write expression what approach we have to use (assume the flow is not as simple as a flow through pipe) Thanks in advance AP ...
The model of turbulence employed is one where the turbulence energy and its dissipation rate are calculated by way of transport equations which are solved simultaneously with the conservation equations for the mean flow. The flows considered include isothermal low Reynolds number pipe flows, and wall...
equation and the resulting chart became known asThe Moody Chartor sometimes the Friction Factor Chart. It was this chart which first enabled the user to obtain a reasonably accurate friction factor for turbulent flow conditions, based on the Reynolds number and the Relative Roughness of the pipe....
I am confused about value of Reynolds Number shown in CFX-Solver Output file. I simulated a laminar flow in a constricted pipe which diameter of the non-constricted section is 20 mm. At Inlet of pipe, streamwise and spiral velocity profiles are applied as Inlet boundary condition as below:...
(2) A pipe model to calculate the leakage rate of a natural gas pipeline when the pipeline is completely broken. This model assumes isentropic release, and a constant pressure is assumed at an initial point in the pipe. The pressure drop along the pipe is taken into account. This model ...
For the former, we can refer to the exact roughness or friction coefficient values in the manual, and the results often lead to worse errors than the actual values. The latter requires tedious work, and some mines have hundreds of tunnels. As the mining depth and the number of working ...
We study high-Reynolds-number flow in a two-dimensional collapsible channel in the asymptotic limit of wall deformations confined to the viscous boundary l... D Pihler-Puzovi?,TJ Pedley - 《Journal of Fluid Mechanics》 被引量: 18发表: 2013年 Free and Mixed Convective Flow of Air in a He...