A structure for disrupting a flow of a fluid, the structure comprising: a first lateral wall and a second lateral wall spaced apart from one another, yet joined, by a floor and a ceiling; and, a vorticor pin, for promoting fluid vortices across the floor and retarding formation of wake regions at the rear of the vorticor pins, extending incompletely between the first lateral wall and the second lateral wall in a direction parallel to an X-axis, the vorticor pin concurrently rising above and extending away from the floor to a height, in a direction parallel to a Y-axis, to provide a gap between the vorticor pin and the ceiling, the vorticor pin comprising: a front surface facing the oncoming direction of cooling airflow and extending incompletely between the first lateral wall and the second lateral wall, the front surface extending above the floor and having an arcuate portion that is transverse with respect to a Z-axis, which is perpendicular to the X-axis and the Y-axis, a rear surface extending incompletely between the first lateral wall and the second lateral wall, the rear surface forming an inclining planar section that tapers in height, taken parallel to the Y-axis, in a direction parallel to the Z-axis and extends between the front surface and the floor; and opposing planar side surfaces (403, 503) extending between the front surface and the rear surface, wherein the side surfaces are parallel to one another or are tapered, wherein the vorticor pin includes dimensions of length, width, and height, wherein these dimensions are all within a factor of five of each other. a first lateral wall and a second lateral wall spaced apart from one another, yet joined, by a floor and a ceiling; and, a vorticor pin, for promoting fluid vortices across the floor and retarding formation of wake regions at the rear of the vorticor pins, extending incompletely between the first lateral wall and the second lateral wall in a direction parallel to an X-axis, the vorticor pin concurrently rising above and extending away from the floor to a height, in a direction parallel to a Y-axis, to provide a gap between the vorticor pin and the ceiling, the vorticor pin comprising: a front surface facing the oncoming direction of cooling airflow and extending incompletely between the first lateral wall and the second lateral wall, the front surface extending above the floor and having an arcuate portion that is transverse with respect to a Z-axis, which is perpendicular to the X-axis and the Y-axis, a rear surface extending incompletely between the first lateral wall and the second lateral wall, the rear surface forming an inclining planar section that tapers in height, taken parallel to the Y-axis, in a direction parallel to the Z-axis and extends between the front surface and the floor; and opposing planar side surfaces (403, 503) extending between the front surface and the rear surface, wherein the side surfaces are parallel to one another or are tapered, wherein the vorticor pin includes dimensions of length, width, and height, wherein these dimensions are all within a factor of five of each other. a front surface facing the oncoming direction of cooling airflow and extending incompletely between the first lateral wall and the second lateral wall, the front surface extending above the floor and having an arcuate portion that is transverse with respect to a Z-axis, which is perpendicular to the X-axis and the Y-axis, a rear surface extending incompletely between the first lateral wall and the second lateral wall, the rear surface forming an inclining planar section that tapers in height, taken parallel to the Y-axis, in a direction parallel to the Z-axis and extends between the front surface and the floor; and opposing planar side surfaces (403, 503) extending between the front surface and the rear surface, wherein the side surfaces are parallel to one another or are tapered, wherein the vorticor pin includes dimensions of length, width, and height, wherein these dimensions are all within a factor of five of each other.