The dilute-to-dense transition of granular flow of particle size d(0) is studied experimentally in a two-dimensional channel (width D) with confined exit (width d). Our results show that with fixed d and D there is a maximum inflow rate Q(c) above which the flow changes from dilute to dense and the outflow rate drops abruptly from Q(c) to a dense rate Q(d). A rescaled critical rate q(c) ...

This paper closes some gaps in the discussion of nonweighted balanced network flow problems. These gaps all concern the phase-ordered augmentation algorithm, which can be viewed as the matching counterpart of the Dinic max-flow algorithm. We show that this algorithm runs in O(nm) time compared to the bound of O(nm) derived in Part III of this series and that the bipartiteness requirement can be...

(Z. Natur forsch. 3 1 a . 8 0 0 8 0 7 [1976] ; received M a y 10, 1976) A two-d imensional Poiseui l le flow in a rad ia l d i rec t ion al lows to study s imul taneously a whole range of flow rates. Three d i f ferent de format ion modes of the d i rector field have been observed, the 'bow' mode, the 'screw' mode, and the 'peak ' mode. Above a c r i t i ca l flow rate the bow mode t ransforms ...

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 ...

OBJECTIVE To investigate the origin of signals from scanning laser Doppler flowmetry (SLDF) and the influence of axial scan depth on the measurement of blood flow in the rat retina. METHODS We performed SLDF in 5 adult Sprague-Dawley rats using a specially modified Heidelberg retina flowmeter. Axial scans were obtained from +2 diopters (D) to -3 D (in steps of 0.25 D) or from +1 D to -2 D (in...

Riverine ecosystems have been altered in many large catchments by dam development to provide water, power, flood control and navigational benefits to humans. Conservation actions in these river ecosystems are commonly focused on minimum releases of water to downstream ecosystems. Increasingly minimum release approaches are being replaced with ‘experimental’ flows that mimic natural conditions i...

The capacity of wireless networks can be improved by the use of multi-channel multi-interface (MCMI), multi-packet reception (MPR), and directional antenna (DA). MCMI can provide the concurrent transmission in different channels for each node with multiple interfaces; MPR offers an increased number of concurrent transmissions on the same channel; DA can be more effective than omni-DA by reducin...

Abbas et al. (Abbas N, Riaz M, Does RJMM. Enhancing the performance of EWMA charts. Quality and Reliability Engineering International 2011; 27(6):821–833) proposed the use of signaling schemes with exponentially weighted moving average charts (named as 2/2 and modified 2/3 schemes) for their improved design structures. A two-sided control structure of these schemes is given in the paper. The co...