To obtain high performance CH3NH3PbI3 perovskite solar cells, it is highly important to realise a open-circuit voltage. Calculation results based on modified diode model have indicated that low bare ratio ϕ of the film most factor determining voltage, where defined as projection uncovered area apparent total substrate surface. ϕ, we investigate nucleation behaviour crystals rough substrates. The analysis predict that, when deposited conventional transparent conductive oxide substrates such...

This study investigates dynamic behaviors of hypoid gear rotor systems under variable tidal current energy harvesting conditions through numerical simulations and experimental validation. The examines responses a system induced by cyclical variations, which generate fluctuating loads bidirectional rotational speeds in conversion systems. Two pairs, modified precise manufacturing parameters, are evaluated to optimize tooth contact patterns for loading conditions. A coupled torsional vibration...

Droplet microfluidics technology presents significant potential for applications in chemical analysis, biological detection, and material preparation. Passive droplet generation methods can rapidly achieve formation by relying on the geometric characteristics of microchannels shear flow. As a typical structure, influence fluid parameters symmetry differences cross process has not been fully studied. Therefore, this paper uses lattice Boltzmann method to conduct numerical simulation studies...

Natural heat convection of water-based alumina (Al2O3/water) nanofluids (with volume fraction 1% and 4%) in a horizontal cylinder is numerically investigated. The whole three-dimensional computational fluid dynamics (CFD) procedure performed completely open-source way. Blender, enGrid, OpenFOAM ParaView are employed for geometry creation, mesh generation, case simulation post process, respectively. Original solver 'buoyantBoussinesqSimpleFoam' selected the present study,...

Severe convection is a disastrous mesoscale weather system. The early detection of such systems very important for saving peoples’ lives and properties. Previous studies address the issue mainly based on thresholding methods, which are not robust accurate enough. In this paper, we propose novel semantic segmentation method (Dugs-UNet) to solve problem. Our well-known U-Net framework. As convective clouds mimic fluids, its faces two challenges. First, shape boundary features need be carefully...

Based on the generalized thermoelasticity with memory-dependent derivative, transient response of a half-space heated by non-Gaussian laser beam its boundary is investigated. The coupled governing equations containing thermal time-delay factor and kernel function, which can be chosen to adapt specific problems, are formulated solved Laplace transform technique numerical inversion. For functionally graded half-space, material properties assumed exponentially vary coordinate. In calculation,...

Due to the existence of machining and installation errors, axis parallelism error gear pairs occurs, which causes eccentric load mesh in-out impact, thus weakening loaded transmission character. To solve this problem, was equated with tooth axial inclination based on gear-meshing principle. On basis, we established modification model as variable according involute helical form-grinding process. Then, degradation character caused by quantitatively analyzed. The grinding, measuring, gearbox...

This paper explores an analytical model for Elastic Ring Squeeze Film Damper (ERSFD) with thin-walled ring and turbulent-jet orifices, uncovers its Oil Pressure Performance (OFPP). Firstly, the deformation is addressed by using Fourier series expansion approach orifice outflow rate characterized Prandtl boundary layer theory. Secondly, applying finite difference scheme, influence of elastic flexibility, diameter, attitude angle on OFPP analyzed. Finally, Outer chamber pressure was measured...

The present work devotes to investigating the transient responses of a half-space with variable thermal material properties based on generalized thermoelastic theory memory-dependent derivative. bounding surface is assumed be traction free and heated by non-Gaussian laser beam. characteristic parameters are as linear function temperature. coupled governing equations containing time-delay factor kernel function, which can chosen adapt specific problems, formulated solved Laplace Kirchhoff...

The present work is devoted to establishing the ultrashort pulse laser ablation generalized thermoelastic model with spatio-temporal nonlocal effect and investigating transient responses of process silicon ablated by picosecond laser. research divided into three cases. 1) solid before target surface melting studied, final state this case are taken as initial conditions Case Two. 2) liquid after researched, heat flux away vaporization considered in boundary condition. 3) discussed, moving...

The inductive voltage and the current flowing in metallic sheath of power cables play important roles service cables, especially influencing their capacities reliabilities. In this paper, for widely used cross-linked grounding a model calculating cable, including which is calculated by an iterative method capacitive differential method, presented. And process proved out comparison between results based on parameters cable measuring ones. addition, there also analysis relationship some...

The present work is devoted to investigating the transient responses of a sandwich structure based on generalized thermoelastic diffusion theory with memory-dependent derivative. Both left and right bounding surfaces are subjected thermal shock chemical potential simultaneously. It assumed that values contact resistance diffusional impedance at interface zero ideal adhesion. coupled governing equations containing time delay factors kernel functions, which can be chosen freely according...