This study include experimental and three dimensional numerical analysis of conjugate steady state laminar forced ferroconvection of Newtonian incompressible ferrofluid through horizontal circular pipe under constant heat flux and in presence of transverse magnetic field. Magnetic field was applied by two fixed parallel magnet bars at the beginning of the tube. To validate the thermohydrodynamic characteristics obtained by numerical results, appropriate experimental setup with accurate instrumentations were conducted. Based on presence and absence of porous media and solid rod inside of pipe six conditions were compared for quantifying the heat transfer enhancement and effectiveness. Governing equations were discretized by FVM and solved using SIMPLE algorithm and CFD techniques. It was found that magnetic field, porous media and solid rod increase heat transfer and pressure loss in pipe such that solid rod has the best effect on heat transfer and worst effect on effectiveness.