Tubular solutions of Dirac-Born-Infeld action on Dp-brane background

We use the Dirac-Born-Infeld action on Dp-brane background to find the tubular bound state of a D2 with mD0-branes and n fundamental strings. The fundamental strings are circular along the cross section of the tube and tube solutions are parallel to the geometry of Dp-brane background. Through the detailed analyses we show that only on the D6-brane background could we find the stable tubular solutions. These tubular configurations may be prevented form collapse by the gravitational field on the curved Dp-brane background.