Numerical analysis of the heat transfer on tandem cylinders, inline and staggered geometries in cross flow of air are investigated for different geometry and flow conditions. Finite element method is used to solve Navier-Stokes and energy equations. Local variations are presented for tandem cylinders geometry with L / D=1.13, 2, 3, 6 and Reynolds number is fixed as 400. Three isothermal cylinders for staggered geometry, four isothermal cylinders for inline geometry were placed in a wide channel and S-t x S-1 was fixed as 2x2 and Reynolds number was varied as the value of 80, 120, 200. The variations of local Nusselt number distributions and local heat transfer coefficient on geometry; temperature contours are obtained over the entire cylinder surface. Comparison of the results with previously published data showed good agreement. (C) 2002 Elsevier Science Ltd.