Despite the successful use of Standard model in simulating turbulent flow for many industrially relevant flows, is still less accurate a range important problems, such as unconfined curved boundary layers, rotating and recirculating flows. As part authors’ effort to extend applicability reliability, this paper aims study effects diffusivity parameter called Prandtl number dissipation rate () on...

There are a number of systems in which supercritical cryogenic fluids are used as coolants or propellant fluids. In some modern military aircraft, the fuel is pressurized above its critical point and used as a coolant to remove heat from the aircraft engine. Accurate prediction of heat transfer coefficients to turbulent flows of supercritical fluids is essential in design of such systems. One o...

We provide the first provable-security analysis of the Intel Secure Key hardware RNG (ISK-RNG), versions of which have appeared in Intel processors since late 2011. To model the ISKRNG, we generalize the PRNG-with-inputs primitive, introduced by Dodis et al. at CCS’13 for their /dev/[u]random analysis. The concrete security bounds we uncover tell a mixed story. We find that ISKRNG lacks backwar...

The well-known Shear Stress Transport (SST k–ω) turbulence model was modified and examined. Two industrially relevant problems with curved rotating channels have been selected to assess the modification potential: a lid in confined cylinder swirling flow through three-dimensional abrupt expansion pipe. postulated amendment simplified rotation curvature correction term that suggested earlier by ...

The limited battery power available in the nodes of an ad hoc network makes it mandatory to reduce the energy expenditure. Thus, reducing the transmission distances between nodes and balancing the number of nodes among clusters are two effective approaches to battery power conservation in the design of green wireless ad hoc networks. To realise this goal, the concept of relative neighbourhood g...

Security and privacy concerns have been growing with the increased usage of the RFID technology in our daily lives. To mitigate these issues, numerous privacy-friendly authentication protocols have been published in the last decade. Random number generators (RNGs) are commonly used in RFID tags to provide security and privacy of RFID protocols. RNGs might be weak spot of a protocol scheme and m...

The present work provides deep insights into methane oxidation in a cyclonic flow field chamber whose strong internal recirculation of burnt products enables the attainment moderate or intense low-oxygen dilution (MILD) combustion regime over wide range operating conditions. Steady-state Favre-averaged Navier–Stokes (FANS) simulations are performed to evaluate thermochemical processes taking pl...

The accumulation of oil mist in the thrust bearings poses a threat to safety unit, leading financial and environmental losses. To investigate generation influencing factors tank bearing pumped-storage power station, novel numerical simulation method is proposed for calculating oil–oil mist–air multi-phase flow based on VOF model, RNG k−ε turbulence Lee model. method’s reliability verified using...

OBJECTIVE To assess the safety, efficacy, and cost-effectiveness of rapid nasogastric hydration (RNG) and rapid intravenous hydration (RIV) administered in the emergency department (ED) to young children suffering with uncomplicated, acute moderate dehydration. METHODS Ninety-six children aged 3 to 36 months, who presented with signs and symptoms of uncomplicated, acute moderate dehydration c...

The commonly used linear k-ε turbulence model is shown to be incapable of accurate prediction of turbulent flows, where non-isotropy is dominant. Two examples of non-isotropic flows, which have a wide range of applications in marine waters, are saline water flow and the stratified flows due to temperature gradients. These relate to stratification and consequently, variation of density through...