Abstract In the hydropower plants exposed to excessive sediment concentration, components of Francis turbines, especially regions Guide Vanes (GVs) and Runner (RVs) are severely eroded. The side-wall clearance between GV runner is present in these turbines separate rotating stationary components. height difference inlet outlet covers, introduced during fabrication or assembly process might play...

Laser polishing (LP) is an effective method to improve the surface quality of additively manufactured nickel-based alloy. In this paper, in-situ laser (ILP) experiment performed on selective melting (SLM) IN718 samples. The white light interferometer used test three-dimensional profile and roughness results show that as-SLMed samples by ILP improved. particular, decreased 33.5%. To reveal mecha...

The dendrite growth in casting and additive manufacturing is rather important related to the formation of some defects. However, quantitatively simulating dendrites with arbitrary crystallographic orientations 3-dimension(3D) still very challenging. In present work, we develop a multi-grid Cellular Automaton (CA) model for growth. this model, interfacial area further discretized into child grid...

The term “hydraulics” is concerned with the conveyance of water that can consist very simple processes to complex physical processes, such as flow in open rivers, pipes, nutrients/sediments, groundwater sea waves. study hydraulics primarily a mixture theory and experiments. Computational helpful quantify predict nature behavior. mathematical model backbone computational consists equations linea...

The current two-dimensional (2D) numerical study presents the melting phenomenon and heat transfer performance of nanocomposite phase change material (NCPCM) based sink. Metallic nanoparticles (copper: Cu) different volume fractions 0.00, 0.01, 0.03, 0.05 were dispersed in RT–28HC, used as a PCM. Transient simulations with conjugate melting/solidification schemes formulated using finite–volume–...

In order to effectually improve the performance of parabolic trough solar collector system and homogenize temperature distribution on absorber tube, an innovative convergent-divergent tube was designed as PTR. The finite volume method (FVM) Monte Carlo ray tracing (MCRT) are combined simulate heat transfer process in collector. average relative error between numerical results experimental condu...

Multiphase flow in porous media provides a wide range of applications: from the environmental understanding (aquifer, site-pollution) to industrial process improvements (oil production, waste management). Modeling of such flows involves specific volume-averaged equations and therefore specific computational fluid dynamics (CFD) tools. In this work, we develop a toolbox for modeling multiphase f...

The behavior of fluid flow has been studied during the different media over past decades. In addition, through porous garnered much research interest. This paper sheds light on fissured rocks oil reservoir (as one domain), and effect these flow. this article, Finite Volume Method (FVM) used to visualize single-phase in an actual core according dualporosity dual permeability model. study was con...

Biomass as a clean and renewable source of energy has immense potential to aid in solving the crisis world. In order accurately predict fluidization behavior biomass particles using Eulerian–Eulerian approach kinetic theory for granular flows (KTGF), employing appropriate models that adapt irregularly shaped can precisely interaction between is crucial. this study, effects varying radial distri...