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This study examines four different square cross section tubes geometries: straight, conical spiral, in-plane spiral, and helical spiral with water as the base working fluid.
Tube architecture varies dramatically in different organs and different species, ranging from tubes formed by several cells constituting the cross section, tubes formed by single cells wrapping an internal luminal space or tubes that are formed within a cell.
A computational study was conducted to investigate the laminar flow heat transfer performance of square cross section tubes, i.e., straight, conical spiral, in-plane spiral, and helical spiral, with water and two nanofluids.
Laminar flow of a Newtonian nanofluid in coils made of square cross section tubes is simulated using computational fluid dynamics (CFD approach, where the nanofluid properties are treated as functions of particle volumetric concentration and temperature.
In our previous study [1 3] (Sasmito AP, Kurnia JC, Mujumdar AS: Numerical evaluation of transport phenomena in a T-junction micro-reactor with coils of square cross section tubes, submitted), we have shown that coiled tubes provide better heat transfer performance relative to straight tubes under certain conditions.
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Figure 6 (a) Mixed mean temperature and (b) total heat transfer at various coiled tubes along the tube length for water and water with 1% Al 2 O 3. Four square cross section tube geometries were examined for flow of nanofluid suspensions of water-Al2O3 with nanoparticle concentration of 1%.
The buckling and post-buckling behaviour of thin-walled square cross-section tubes subjected to static compression is presented.
The results of the experimental buckling and postbuckling behaviour analysis of thin-walled, square cross-section tubes subjected to pure bending are presented.
One, a modular barrier, was fabricated from circular cross-section tubes, bolted sheet moulded composite (SMC) two-part multi-way connectors and bases.
The present paper describes the performance of polyurethane (PU) foam as an internally-reinforced filler material on pultruded composite square cross-section tubes made of E-glass/polyester resin and subjected to axial and oblique loading.
The minimum storage pressure of spontaneous ignition is only 1.98 MPa in the tube with local enlargement, which is lower than that in a constant cross-section tube.
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