Influence of thermal radiation on the boundary layer flow due to an exponentially stretching sheet

The effect of radiation on the boundary layer flow and heat transfer of a viscous fluid over an exponentially stretching sheet is studied. The homotopy analysis method (HAM) is employed to determine the convergent series expressions of velocity and temperature. The physical interpretation to these expressions is assigned through graphs. It is found that the effects of Prandtl and radiation numbers on the temperature are opposite.     

MHD rotating flow of a third-grade fluid on an oscillating porous plate

Summary The rotating flow of a third-grade fluid on an oscillating porous plate in the presence of a transverse magnetic field is considered. An analytic solution of the governing nonlinear boundary layer equation is obtained. Expressions for the velocity profile are established. It is found that an external magnetic field has the same effect on the flow as the material parameters of the fluid. Further the symmetric and asymmetric nature of the solutions is discussed.     

The effects of MHD and buoyancy on Hematite water-based fluid past a convectively heated stretching sheet

Neural Computing and Applications - In the present paper, we examined the buoyancy effects on MHD two-dimensional boundary layer flow in the presence of heat transfer of Hematite–water...     

Unsteady flow and heat transfer of tangent-hyperbolic fluid: Legendre wavelet-based analysis

The objective of the current article is to explore the unsteady flow and heat transfer of magnetohydrodynamics tangent-hyperbolic fluid flow over a stretching sheet. The governing flow model is transformed into a nonlinear set of ordinary differential equations by utilizing the appropriate similarity techniques. A new modification is introduced into the traditional Legendre wavelet method to obtain the results of the model mentioned above. The classic wavelet scheme is unable to find the solution for an infinite domain. Hence, we successfully extended it for an infinite domain and used it to attain the significant findings of the fluid problem. Additionally, the study of emerging parameters on temperature and velocity profiles is reported graphically. The velocity behavior is decreasing for the physical parameters, namely, power-lax index, unsteadiness, Hartmann number, and Weissenberg number. The temperature profile is an increasing function for power-law index and Eckert number while the behavior is the opposite for the Prandtl number. Moreover, a tabular form comparison of outcomes with existing literature, convergence, and error analysis is provided in our study, which confirms the credibility of the suggested method. The obtained results endorse the credibility and reliability of the proposed method; therefore, it could be extended for other nonlinear problems of complex nature.     

Seeding,nitrogen and irrigation management optimize rice water and nitrogen use efficiency

Nutrient Cycling in Agroecosystems - Adoption of appropriate agronomic practices, such as optimum seeding and nitrogen (N) rates, in synchronization with proper water management practice could help...     

Water sorption studies on ZnSO4-zeolite composite as potential thermochemical heat storage materials

ZnSO₄·7H₂O is modified by impregnation method with zeolite matrices (13X-zeolite and LTA-zeolite) to improve its hydration performance. Water sorption ability of composites was carried out in a constant temperature and humidity environment. Composite of ZnSO₄/13X-zeolite showed highest water sorption (0.26 g/g) at 75% relative humidity under 45°C air temperature, which is double than pure ZnSO₄·7H₂O. This is due to larger surface area (491 m² g^-1) and pore volume (0.31 cm³). Furthermore, both hydration rate and adsorption mass depends on relative humidity and hydration temperature. However, if the air temperature and the relative humidity are higher than 45°C and 75% RH, the hydration ability of the composite material is significantly reduced. Besides, X-ray measurements of composite (ZnSO₄/13X) revealed that sorption/desorption process, crystallinity and phase of partially hydrated ZnSO₄ remain the same, which enhance the adsorption mass and enthalpy during the hydration process.     

Two-dimensional median filter algorithm for parallel reconfigurablecomputers

A fast and flexible median algorithm is presented which scales well with window size. It is based on the use of image histograming. Two accumulator arrays are used to determine the median value of a discrete sequence of numbers. Speed-up factors of 3 and 4 are achieved over conventional histograming methods (those using single accumulator arrays). Two approaches have been implemented with optimisation in mind. Worst- and best case machine performance boundaries are defined. Timings are given for both types of parallel architecture     

Periodic unsteady flows of a non-Newtonian fluid

Summary Exact analytic solutions for the flow of non-Newtonian fluid generated by periodic oscillations of a rigid plate are discussed. Some interesting flows caused by certain special oscillations are also obtained.