The inverse heat conduction method (IHCM) and three-dimensional (3D) computational fluid dynamic (CFD) in combination with are used to select the appropriate flow model near-wall treatment for mixed convection of annular finned tube exchanger. Thus, numerical results obtained by all k-ε models treatments yielded 4 m/s ≤ Va 5 m/s. First, IHCM combined is applied estimate Q values. estimates as r...

Wastewaters are commonly discharged into the seas and oceans through multiport diffusers. Accurate prediction of complex interactions diffusers with receiving water bodies is significant for optimal design outfall systems has yet to be fully illuminated. In current study, mixing dilution characteristics multiple inclined dense jets studied using a three-dimensional numerical simulation. The Lau...

Amid all convective heat transfer augmentation methods employing single phase, jet impingement delivers significantly higher coefficient of local transfer. The arrangement leading to nine jets in square array has been used cool a plate maintained at constant flux. Numerical study carried out using RANS-based turbulence modeling commercial CFD Fluent software. turbulent models for the are three ...

When converting a baffled stirred reactor to work with different fluid, usually the original impeller must be replaced customized one. If was designed for mixing liquids, its performance liquid–solid suspensions may not satisfactory. A case study is presented, where two-blade new three-blade design. The shows clear improvements in suspension, while keeping shaft power practically at same level....

This paper proposes an ultra-low power CMOS random number generator (RNG), which is based on an oscillator-sampling architecture. The noisy oscillator consists of a dual-drain MOS transistor, a noise generator and a voltage control oscillator. The dual-drain MOS transistor can bring extra-noise to the drain current or the output voltage so that the jitter of the oscillator is much larger than t...

Random number generation (RNG) requires executive control. A novel paradigm using the eight drum pads of an electronic drum set as an input device was used to test 15 healthy subjects who engaged in random or ordered number generation (ONG). Brain potentials time-locked to the drum-beats revealed a more negative response during RNG compared to ONG which had a left frontal distribution. Source a...

We propose methods for constructing high-quality pseudorandom number generators (RNGs) based on an ensemble of hyperbolic automorphisms of the unit two-dimensional torus (Sinai-Arnold map or cat map) while keeping a part of the information hidden. The single cat map provides the random properties expected from a good RNG and is hence an appropriate building block for an RNG, although unnecessar...

The problem of efficiently disseminating data from a mobile stimulus (source) to multiple mobile users (sinks) in a large-scale sensor network has been challenging. We address this problem by proposing a minimum-energy tree-based data dissemination scheme, Dynamic Localized Minimum-Energy Agent Tree-Based Scheme (DLATS). We exploit the fact that sensor nodes are stationary and location-aware. I...

Introduction: Random number generation is indispensable in cryptography, scientific computing and stochastic computing. In cryptography, the quality of randomness of the generator is critical for security [1]. The pseudo-RNG generates sequences using a deterministic algorithm, so the sequence inevitably repeats and becomes predictable. A true RNG is nondeterministic and unpredictable, often rel...