Secondary Recirculation Gas Flow Impact on Parasitic Surface Powder Accretion in Tool Steels
Secondary recirculation gas flow controls spatter condensate extraction in 1.2709 tool steel L-PBF to eliminate surface accretion and fatigue voids.
Bernoullian Shear Stress
Meaning
Fluid dynamics in electrolyte circulation systems define the mechanical load applied to electrode surfaces by moving liquids. While laminar flow is generally preferred, bernoullian shear stress arises when local velocity gradients create a dragging force across the active material interface. This measurement quantifies the mechanical wear on the solid electrolyte interphase and ends where the fluid detaches from the surface or becomes stationary.
Boundary Interaction
Friction at the microscopic level occurs when the viscosity of the electrolyte resists the movement of the bulk fluid. Although bernoullian shear stress is often calculated using fluid density and velocity squared, the actual impact depends on the surface roughness of the electrode. High shear forces can physically strip particles from the electrode coating.
Erosion Risk
Continuous exposure to high velocity gradients leads to the gradual thinning of protective layers. This specific bernoullian shear stress determines the rate at which electrode materials degrade under pump driven circulation.
Viscous Impact
Liquid properties such as temperature and salt concentration change the magnitude of the force. Because bernoullian shear stress relies on the Reynolds number of the system, thinner electrolytes at high temperatures pose a greater mechanical risk to delicate separator membranes than viscous fluids at room temperature. Mechanical stability is maintained by limiting flow rates during peak thermal events.