نتایج جستجو برای: trapezoidal shape factor

تعداد نتایج: 1026661  

A micro-channel heat exchanger reactor with different micro-baffle shapes has been studied numerically. Governing equations were solved base on the finite volume method with FLUENT software. In upper section, oxidation reaction of methanol was occurred and in lower section, steam reforming of methanol was done. Two sections were separated with solid part which played as heat exchanger and trans...

Journal: :Memorias do Instituto Oswaldo Cruz 2009
Cláudia Portes Santos Juan Tomás Timi

Absonifibula estuarina sp. n. (Diclidophoridae, Absonifibulinae), is described from the gills of juvenile striped weakfish, Cynoscion guatucupa (Cuvier), from the southwestern Atlantic, Argentinean coast. This marine fish migrates to estuarine areas to spawn where exclusively juveniles are found parasitized; adult fish in marine water were never found to be parasitized by this monogenean. A. es...

Journal: :J. Comb. Theory, Ser. A 2015
Amy Glen Florence Levé

The factor complexity function C w (n) of a finite or infinite word w counts the number of distinct factors of w of length n for each n ≥ 0. A finite word w of length |w| is said to be trapezoidal if the graph of its factor complexity C w (n) as a function of n (for 0 ≤ n ≤ |w|) is that of a regular trapezoid (or possibly an isosceles triangle); that is, C w (n) increases by 1 with each n on so...

2006
Weibin Zhang Michael Requa Kimberly Turner

This research quantitatively investigates fluid damping of MEMS and NEMS flexural resonators such as scanning probe and carbon nano-tube resonators, aiming to improve the quality factor prediction and therefore the resonator design. Fluid damping in beam-type resonators is most affected by resonant frequency, device dimensions and cross-sectional shape which are systematically examined within. ...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2015
komeil mohebbi rohollah rafee farhad talebi

in this paper, convection heat transfer of al2o3-water nanofluid turbulent flow through internally ribbed tubes with different rib shapes (rectangular, trapezoidal and semi-circular) is numerically investigated. for each rib shape, the optimum geometric ratio and volume fraction were calculated using entropy generation minimization technique. the governing equations in steady state and axisymme...

Journal: :Symmetry 2022

The cooling performance of the air-conditioning system in electric vehicles could be enhanced through geometrical optimization air ducts. Furthermore, it has been proven that heat-transfer divergent channels is better than conventional channels. Therefore, present study investigates thermal and flow characteristics ducts with various rib shapes for vehicles. characteristics, namely, temperature...

Journal: :Water 2022

Experimental results on scour at abutments under unsteady clear water flow condition are presented. Three shapes of short (abutment length/upstream depth < 1) were tested, namely, rectangular/vertical wall, semi-circular, and trapezoidal/45° wing-wall embedded in uniform sands two sizes having d50 = 0.52 mm 0.712 mm. The unsteadiness the is considered form flood hydrographs three forms, name...

In order to increase the efficiency of the conveyance of the granular solids, a new experimental set-up is designed. The test rig has longitudinal trapezoidal slots in its conveying pipes. Through experimentation, a correlation for friction factor in terms of solid mass flow rate, fluid flow rate and Froude number is presented. It is shown that the mixture friction factor for pipes with inn...

Journal: :The bone & joint journal 2016
M P Bonnin M Saffarini N Bossard E Dantony J Victor

AIMS Analysis of the morphology of the distal femur, and by extension of the femoral components in total knee arthroplasty (TKA), has largely been related to the aspect ratio, which represents the width of the femur. Little is known about variations in trapezoidicity (i.e. whether the femur is more rectangular or more trapezoidal). This study aimed to quantify additional morphological character...

2009
S. Schwenk M. Weigel V. G. Kiselev J. Hennig

Motivation Diffusion weighted Hyperecho (HEDW) Imaging [1-3] has maintained some interest during the last years since it has the potential to offer a probe for tissue microstructure. One meaningful parameter for such a multi spin echo diffusion sequence is the knowledge of the exact effective b-factor [4] exhibited. The present work examines the effect of the common simplification to use rectan...

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