01676nas a2200217   4500008004100000022001400041245007700055210006900132260000800201300001100209490000700220520098300227653001901210653002201229653002801251653001701279653001801296100002201314700002301336856009901359       2021                        eng d  a0169-598300aEffect of object shape on the flow past microstructures in small channel0 aEffect of object shape on the flow past microstructures in small  cFEB  a0155050 v533 a<p>Flow past objects in microfluidics and microscale devices are used to perturb the flow and thereby achieve effective mixing and heat transfer. This paper presents the observations on the flow past bluff (elliptical, rectangular and triangular) cylindrical micropillars (objects) having different cross-sectional area in a micro-channel through 2D simulations. The pertinent range of Re based on object dimension (0.1 Re 150) was chosen to understand the wake dynamics that would remain relevant for comparison with literature data. Drag coefficient, recirculation region, critical Reynolds number for flow oscillations and vortex strength in a channel were studied. The drag coefficient was found to increase with aspect ratio of the object. The critical Re for flow oscillations was found to increase with the cross-sectional area of the object. The vortex strength in a channel was seen highest for triangular cylinder compared to elliptical and rectangular cylinder.</p>
10a2D simulations10aflow past objects10amicro and mini-channels10amicropillars10awake dynamics1 aMule, Gunwant, M.1 aKulkarni, Amol, A.  uhttps://library.ncl.res.in/content/effect-object-shape-flow-past-microstructures-small-channel