The exchange of groundwater between land and sea is a major component of the hydrological cycle. This exchange, called submarine groundwater discharge (SGD), is comprised of terrestrial water mixed with sea water that has infiltrated coastal aquifers. The composition of SGD differs from that predicted by simple mixing because biogeochemical reactions in the aquifer modify its chemistry. To emph...

This paper explores the effect of impeller design on the chaotic mixing in a helical ribbon mixer. Numerical simulations using the Smoothed Particle Hydrodynamics (SPH) method are used to solve for the fluid flow around the moving impellor. The mixing flow is visualised by extracting the hyperbolic Lagrangian Coherent Structures (LCS) of the flow from the Finite-Time Lyapunov Exponent (FTLE) fi...

This research aims to investigate the material flow behaviour and microstructure evolution in friction stir welded joints of dissimilar aluminium alloys AA2024/AA5086. AA2024 plate was placed on re- treating side; using threaded conical flat shoulder tool rotating at 635 rpm moving along joint line with a speed 75mm/min. Mixing both clearly visible zone resulted features typical welding solid s...

• Experimental and modeled data are used to explain solids back-mixing. Solids back-mixing occurs mainly through the wall layers. Core-to-layer transfer governs in front of lateral dispersion core region. Turbophoresis is identified drive core-to-layer transfer. decay coefficient can be described by a Sh -expression for internal flow. This work investigates transport zone large-scale circulatin...

Abstract. Riparian zones are known to modulate water quality in stream corridors. They can act as buffers for groundwater-borne solutes before they enter the at harmful, high concentrations or facilitate solute turnover and attenuation where (SW) groundwater (GW) mix. This natural capacity is strongly controlled by dynamic exchange of between adjoining aquifer, creating potential mixing-depende...