نتایج جستجو برای: helical tube
تعداد نتایج: 119987 فیلتر نتایج به سال:
A theory-based prediction method was used to estimate the friction factor and heat transfer rate in turbulent flow of a helically coiled tube. The secondary produced by centrifugal force improves mass transfer; therefore, spiral coil pipes are widely variety industrial applications. law wall Reynolds analogy, which states that momentum is equivalent transfer, were this theoretical method. logar...
Helical and chiral plasma structures are ubiquitous, especially in nuclear fusion devices space plasmas. However, the spontaneous formation of helical has rarely been noticed non-equilibrium cold jets that have wide applications biomedicine material science. Recently plume without any notable asymmetry discovered. Under specific parameters pulsed discharges, bullets at beginning propagated stra...
BACKGROUND AND PURPOSE CT is a frequent examination that is performed using ionizing radiation. We sought to assess image-quality changes on CT scans of the head when the radiation dose is reduced by changing tube current and kilovoltage. METHODS A formalin-fixed cadaver was examined in conventional and helical mode by use of two CT-scanners. Surface dose was measured with standard scanning p...
We have constructed a robust β-helical nanotube from the component proteins of bacteriophage T4 and modified this nanotube with Ru(II)(bpy)(3) and Re(I)(bpy)(CO)(3)Cl complexes. The photocatalytic system arranged on the tube catalyzes the reduction of CO(2) with higher reactivity than that of the mixture of the monomeric forms.
Experiments and CFD-PBM simulation were performed in this study to investigate the effects of helically-finned tube (HFT) internals on gas-liquid flow a laboratory-scale bubble column. Hydrodynamic parameters, including gas holdup, size field as well turbulence properties, compared for an empty column other two columns with bare-tube (BT) or HFT internals. We found that bare rods promote stabil...
The sheath of the Serratia entomophila antifeeding prophage, which is pathogenic to the New Zealand grass grub Costelytra zealandica, is a 3-fold helix formed by a 4-fold symmetric repeating motif disposed around a helical inner tube. This structure, determined by electron microscopy and image processing, is distinct from that of the other known morphologically similar bacteriophage sheaths.
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