Note! -due to larger circumference and more friction area related to air volume - a circular duct is always more efficient than a rectangular duct. Make Shortcut to this Calculator on Your Home Screen? . Example - Air Flow in Rectangular vs. Circular Duct ...
The detailed theoretical formula is shown in Eq. (4). (4)LAdWdt=ΔPd-ΔPf+ΔPa where L is channel length, A is flow area, W is mass flow rate, t is time, ΔPd, ΔPf and ΔPa are the driving pressure drop, resistance pressure drop and additional pressure drop, respectively. It ...
A cabling duct for switch cubicles consists of a semi-closed conduit and a cover plate. The cover plate has a width less than the full width of the conduit. The conduit has a rectangular cross-section with vertical slits in the side walls. These may carry over into the lips at the top...
Ahmed and Attia 5 and Attia 6 conducted further research on the heat transmission and magneto hydrodynamic flow within a rectangular duct. The transient Hartmann flow of an incompressible dusty magnetic fluid in a rectangular channel was considered by Hassan and Attia.7 Ramana Murthy and Bahali.8...
In a compact heat exchanger, a gas-liquid two phase mixture flows in a noncircular channel with a narrow cross sectional area. Therefore it is necessary to clarify the flow phenomena and the pressure drop in such a small channel. In the present experiment, we used capillary vertical rectangula...
Direct simulation of 3D MHD flows in a duct with flow channel insert (FCI) relevant to R&D of fusion blanket has been conducted based on an electrical potential formula by using a consistent and conservative scheme. Comparison study of the pressure and velocity distributions of liquid metal in ...
For the case that the aspect ratio of the cross-section of rectangular duct was five, both the basic flow and the disturbance equations were solved within a cross-sectional area. By comparing the symmetry modes between the X-directional and the Y-directional magnetic fields, the symmetry mode ...
Here, 𝑥+x+ is the dimensionless duct length, and 𝑥x is the local position in the flow direction. The Reynolds number is defined as 𝑅𝑒=𝜌𝑢𝑚𝐷ℎ/𝜇Re=ρumDh/μ, 𝜇μ is the fluid viscosity, 𝐷ℎDh is the hydraulic diameter of a rectangular channel defined as...