The harnessing and utilization of tidal current energy have emerged as prominent topics in scientific inquiry, due to their vast untapped resource potential, leading numerous investigations into the efficacy hydrokinetic turbines under various operational conditions. This paper delineates wake field characteristics performance horizontal axis stream influence support structures, using a compreh...

This research investigates the fluid flow characterization and thermohydraulic performances (THP) of rib surfaces, using computational experimental methods. ANSYS dynamics (CFD) software was used to predict validate findings in setup. Artificial including polygonal forward trapezoidal-shaped ribs, were placed absorber plate at different relative pitch distances (p/e) = 6.7, 10, 13.4 height (e/d...

The main objective of this research was to create two different configurations a flat-plate solar air heater, namely, Conventional-Case A and Modified-Case B, develop three-dimensional computational fluid dynamics (CFD) model using ANSYS R15.0. purpose the CFD simulate heat transfer behavior proposed heaters under unsteady conditions. RNG k-ε turbulence employed for study. experiments were cond...

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...

Matrix Exponential (ME) probability distributions form a versatile family of distributions and enable an accurate description and simulation of a wide variety of situations where a positive distribution is required. In queueing theory they are used for arrival and service processes. Random Number Generators (RNG) for ME’s are not commonly available. In this work, we create a new ME RNG by scali...

Numerical simulation is used to carry out research on the swirl flow transportation of a hydrate in pipeline under condition whole rotation twist tape using DPM (discrete phase modeling) and RNG (renormalization group) k-ε. The influence different parameters number concentration distribution particles analyzed. structure are optimized, based efficiency evaluation gas-solid two-phase pipeline. F...

We investigated the psychometric properties of the random number generation (RNG) task in four studies using a mixed sample of young adults (n = 306), middle-aged adults (n = 40), and patients diagnosed with schizophrenia (n = 26). Data in study 1 were best accounted for by a three-factor solution representing inhibition of stereotypical schemas (seriation), output inhibition (repetition), and ...

In this article, we have proved the Darboux's theorem. This theorem is important to prove the Riemann integrability. We can replace an upper bound and a lower bound of a function which is the definition of Riemann integration with convergence of sequence by Darboux's theorem. We adopt the following rules: x, y are real numbers, i, j, k are natural numbers, and p, q are finite sequences of eleme...

The unsteady and random character of turbulent flow motion is a key aspect of the multidimensional modeling of internal combustion engines (ICEs). A typical example can be found in the prediction of the cycle-to-cycle variability (CCV) in modern, highly downsized gasoline direct injection (GDI) engines, which strongly depends on the accurate simulation of turbulent in-cylinder flow structures. ...

Bottom outlets are significant structures of dams, which responsible for controlling the flow rate, operation, or removal reservoir sedimentation. The service gate controls outlet and whenever this is out order, emergency located at upstream utilized. cavitation phenomenon one common bottom outlets’ problems due to rapid transfer. present research a numerical study pattern in dam’s different op...