There is recent interest in using traffic-engineered, QoS-controlled paths for large-sized, high-rate dataset transfers in the scientific community. We refer to TCP flows created by such transfers as α flows. Research-and-education network providers are interested in intra-domain traffic engineering systems for identifying α flows at ingress routers within their networks, and redirecting them t...

Abstract. We study flow-induced enhancement of the speed of pulsating traveling fronts for reaction-diffusion equations, and quenching of reaction by fluid flows. We prove, for periodic flows in two dimensions and any combustion-type reaction, that the front speed is proportional to the square root of the (homogenized) effective diffusivity of the flow. We show that this result does not hold in...

Multi-dimensional and transient flows play a key role in many areas of science, engineering, and health sciences but are often not well understood. The complex nature of these flows may be studied using particle image velocimetry (PIV), a laser-based imaging technique for optically accessible flows. Though many forms of PIV exist that extend the technique beyond the original planar two-componen...

The high-speed camera had a rapid progress in early 2000s. The C-MOS chip camera now can record 7,500 frames per second (fps) with 1M pixel image resolutions. We can capture 30,000fps images with VGA image resolution. These images have both of high-temporal and high-spatial resolutions. The two-phase flow and boiling phenomena are usually highly non-linear and need high-temporal and high-spatia...

Recently, high performance data transfer services is needed in longdistance high-speed networks. However, it has been reported that data transfer with TCP cannot achieve high throughput in LFN. As one of the solution overcome that, the data transfer protocol UDT which has rate control and adds reliability based on UDP is proposed. However the high volume data transfer with UDT is much aggressiv...

While flamelet-based progress variable models have matured to production-level in recent years for incompressible flows, little development toward compressible formulations of the flamelet model has ensued. For supersonic and hypersonic flows exhibiting combustion, an applicable flamelet-based combustion model must reflect the compressible nature of the flow, the tight coupling of the flow and ...

The computational cost of the direct simulation Monte Carlo solutions of rarefied flows increases with decreasing average flow velocity due to larger noise-to-signal ratio and a longer time to reach the steady state. For such low-speed flows, the discrete-ordinate solution of kinetic model equations can provide accurate and computationally efficient numerical modeling. In this work, analysis of...

FAST TCP is a promising new transfer control protocol developed for high-speed long-latency networks, whose performance has previously only been studied for data traffic sent in one direction. In this study, the authors propose a mathematical model for bi-directional connections using the FAST TCP protocol, which captures the asymmetric bandwidth dynamics in duplex dumbbell networks, prevalent ...