A method for producing a glass article, comprising: feeding with at least one screw feeder a raw material into a melting vessel containing molten glass, the melting vessel comprising a back wall, a front wall, a first side wall, a second side wall and a bottom wall, the melting vessel comprising a length L extending from an inside surface of the back wall to an inside surface of the front wall, a width W orthogonal to the length L extending from an inside surface of the first side wall to an inside surface of the second side wall, a longitudinal centerline extending along the length L and equidistant from both the first and second side walls (104, 106), wherein L/W is in a range from 2.0 to 2.4; and heating the molten glass with an electric current between a plurality of electrodes extending into an interior of the melting vessel through the bottom wall of the melting vessel, thereby producing a plurality of convection flows in the molten glass comprising a first convection flow at a first flow velocity parallel to the centerline in a direction toward the back wall, a second convection flow at a second flow velocity parallel to the centerline toward the front wall, a third convection flow at a third flow velocity in a transverse direction from the centerline toward the first side wall and a fourth convection flow at a fourth flow velocity in a transverse direction from the centerline toward the second side wall, characterized in that: L·W is equal to or less than 17 square meters; the plurality of electrodes comprise molybdenum; and an integrated ratio of the first flow velocity to the second flow velocity along the centerline 5.1 cm below a surface of the molten glass is equal to or greater than 1.5. feeding with at least one screw feeder a raw material into a melting vessel containing molten glass, the melting vessel comprising a back wall, a front wall, a first side wall, a second side wall and a bottom wall, the melting vessel comprising a length L extending from an inside surface of the back wall to an inside surface of the front wall, a width W orthogonal to the length L extending from an inside surface of the first side wall to an inside surface of the second side wall, a longitudinal centerline extending along the length L and equidistant from both the first and second side walls (104, 106), wherein L/W is in a range from 2.0 to 2.4; and heating the molten glass with an electric current between a plurality of electrodes extending into an interior of the melting vessel through the bottom wall of the melting vessel, thereby producing a plurality of convection flows in the molten glass comprising a first convection flow at a first flow velocity parallel to the centerline in a direction toward the back wall, a second convection flow at a second flow velocity parallel to the centerline toward the front wall, a third convection flow at a third flow velocity in a transverse direction from the centerline toward the first side wall and a fourth convection flow at a fourth flow velocity in a transverse direction from the centerline toward the second side wall, characterized in that: L·W is equal to or less than 17 square meters; the plurality of electrodes comprise molybdenum; and an integrated ratio of the first flow velocity to the second flow velocity along the centerline 5.1 cm below a surface of the molten glass is equal to or greater than 1.5. L·W is equal to or less than 17 square meters; the plurality of electrodes comprise molybdenum; and an integrated ratio of the first flow velocity to the second flow velocity along the centerline 5.1 cm below a surface of the molten glass is equal to or greater than 1.5.