Title of dissertation: LOW REYNOLDS NUMBER FLOW VALIDATION USING COMPUTATIONAL FLUID DYNAMICS WITH APPLICATION TO MICRO AIR VEHICLES Eric J. Schroeder, Master of Science, 2005 Thesis directed by: Associate Professor James D. Baeder Department of Aerospace Engineering The flow physics involved in low Reynolds number flow is investigated computationally to examine the fundamental flow properties ...

Transition from laminar flow to turbulent flow occurs very often and plays a crucial role in many practical engineering flows. There are many different kinds of transition and broadly speaking they can be classified into three categories: classical transition in attached boundary; bypass transition in attached boundary layer and separated boundary layer transition. This paper presents a compara...

The Poiseuille flow (centreline velocity $U_c$ ) of a fluid (kinematic viscosity $\nu$ past circular cylinder (radius $R$ in Hele-Shaw cell (height $2h$ is traditionally characterised by Stokes ( $\varLambda =(U_cR/\nu )(h/R)^2 \ll 1$ through thin gap $\epsilon =h/R ). In this work we use asymptotic methods and direct numerical simulations to explore the parameter space $\varLambda$ – $\epsilon...

Separation of proteins from whey; namely α – Lactoglobulin and β – Lactalbumin was obtained using the bubble foam column technique. Two types of whey were conducted in this study; yogurt whey and cheese whey. The effect of gas flow-rate and the height of the whey (liquid holdup) inside the column were studied at room temperature and at constant pH of whey. Whey used here obtained from local dai...

In a compressor, the periodic wake is an inherently unsteady phenomenon that affects downstream flow conditions and loading distribution. Thus, understanding physical mechanisms of these effects important for eliminating losses improving compressor performance, particularly at low Reynolds numbers. To understand influence upstream on field structure, this paper describes numerical simulations o...

There are at least two direct links between the friction acting on surface of a (slightly warmer or colder) body under influence an incompressible flow and temperature distribution itself. The first relies energy equation, which connects evolution wall to action skin-friction field. On other hand, equation passive transport perturbations unveils relationship celerity propagation thermal blobs v...

A structural motif designed for enhancing electron–hole separation in semiconducting composite materials, the so-called double bubble, is introduced. The addition of silicon carbide in the construction of heterogeneous double bubble systems, along with zinc oxide and gallium nitride, yields electronic structures that are favourable for electron–hole separation. The standard formation enthalpies...

Transverse dunes, which form under unidirectional winds and have fixed profile in the direction perpendicular to the wind, occur on all celestial objects of our solar system where dunes have been detected. Here we perform a numerical study of the average turbulent wind flow over a transverse dune by means of computational fluid dynamics simulations. We find that the length of the zone of recirc...

the molecular weight effects diffusion of molecules in interface laminar flow form a microfluidic channel. Two mixtures PS with anisole and PEG were used to evaluate effect on separation. Also, separation low substance from mixture high is proved experimentally. However, remained difficulty. More information about channel can be applied polymer science fields.