NOVELTY - A galvanic electrochemical cell (100) comprises first cylinder-like current collectors (106A), and second cylinder-like current collectors (108A) having terminals (Ti1, Ti2); cylinder-like spinning filter (140) in fluid electrolyte gap; units (148) for rotating spinning filter to create Taylor Vortex Flows (152) in inner electrolyte chamber (156) and outer electrolyte chamber (158); and units for creating convection gradients that flow electrolyte from one of inner and outer electrolyte chamber to other of inner and outer electrolyte chamber in a first direction through spinning filter.    USE - As galvanic electrochemical cell for converting chemical energy into electrical energy for delivery to an electric circuit. The galvanic electrochemical cell is flow battery and fuel cell (all claimed).    ADVANTAGE - The present galvanic electrochemical cells have their galvanic components (e.g. charge transfer particles (CTP)) separated from their current collectors so that performance of each type of component can be optimized; provide convection gradient flows for cations that need move in one direction and anions that need to move in an opposite direction; make available a stoichiometric balance of cations to react with all available anions; use fluid dynamics to depolarize current collectors that have attached ions reducing their electropotentials; and provides Taylor Vortex Flows (TVF) forced convective electrolyte flow that accelerates chemical reaction kinetics. The present galvanic cells offer structures that provide improved fluid dynamics (e.g. TVF, Circular Couette Flows (CCF)) for use with flowable electrolyte suspensions that contain galvanic charge transfer particles acting as electrodes in coordination with current collectors that need not contain galvanic materials. Unlike prior art fuel cells where galvanic particles are sparsely secured in fixed positions to electrodes and difficult to replace, the charge transfer particles in the present galvanic cells are plentiful and can be easily replaced by simply replacing the electrolyte suspension. These differences amongst others such as provision for providing catholyte and anolyte convection flows in opposing directions provide more economical galvanic cells with higher current densities.    DETAILED DESCRIPTION - A galvanic electrochemical cell (100) for converting chemical energy into electrical energy for delivery to an electric circuit comprises: a) first cylinder-like current collectors (106A, 106B), and second cylinder-like current collectors (108A, 108B) having terminals (Ti1, Ti2, To1, To2) for electrical connection to the electric circuit and separated from each other by a fluid electrolyte gap (130) between the current collectors; b) a cylinder-like spinning filter (140) in the gap dividing the gap into an inner electrolyte chamber (156) and an outer electrolyte chamber (158); c) units (148, 150) for rotating the spinning filter to create Taylor Vortex Flows (152, 154) in the inner electrolyte chamber and the outer electrolyte chambers when the inner electrolyte chamber and the outer electrolyte chamber contain an electrolyte; and d) units for creating convection gradients that flow the electrolyte from one of the inner electrolyte chamber and the outer electrolyte chamber to the other of the inner electrolyte chamber and the outer electrolyte chamber in a first direction through the spinning filter. The galvanic electrochemical cell additionally comprises: fluid electrolyte in the inner chamber and the outer chamber of the gap; charge transfer particles of a first type suspended in the electrolyte of the inner chamber; and charge transfer particles of a second type suspended in the electrolyte of the outer chamber. INDEPENDENT CLAIMS are included for the following:    (1) operating a flow battery to produce electricity for transmission to an electrical circuit involving a1) filling the outer electrolyte chamber with catholyte containing charge transfer particles in suspension; b1) filling the inner electrolyte chamber with anolyte containing the charge transfer particles in suspension; c1) pumping oxidizer through oxygen port into the oxygen manifold so that it penetrates the pores of the outer current collector; and d1) rotating the spinning filter at a rate of rotation adequate to cause i) catholyte flows comprising Taylor Vortex Flows and Circular Couette Flows, to form in the outer electrolyte chamber catholyte that accelerate the charge transfer particles to collide with a current collector wall; and ii) anolyte flows comprising Taylor Vortex Flows and Circular Couette Flows, to form in the inner electrolyte chamber anolyte that accelerate the charge transfer particles to collide with a current collector wall, where the charge transfer particles contain faradaic materials; and    (2) operating a fuel cell to produce electricity for transmission to an electrical circuit involving a2) filling the outer electrolyte chamber with catholyte containing charge transfer particles in suspension; b2) filling the inner electrolyte chamber with anolyte containing charge transfer particles in suspension; c2) pumping oxidizer through oxygen port into the oxygen manifold so that it penetrates the pores of the outer current collector; d2) pumping fuel through fuel port into the fuel manifold so that it penetrates the pores of the inner current collector porous metal wall to form menisci at the interface of the anolyte with the inner current collector; and e2) rotating the spinning filter at a rate of rotation adequate to cause i) and ii).    DESCRIPTION OF DRAWING(S) - The figure shows a cross section drawing of Taylor Vortex Flows (TVF) flow battery.    Galvanic electrochemical cell (100)    First cylinder-like current collectors (106A, 106B)    Second cylinder-like current collectors (108A, 108B)    Fluid electrolyte gap (130)    Cylinder-like spinning filter (140)    Units for rotating the spinning filter to create Taylor Vortex Flows (148, 150)    Taylor Vortex Flows (152, 154)    Inner electrolyte chamber (156)    Outer electrolyte chamber (158)