A numerical investigation of the heat transfer characteristics and the self-sustained oscillations flow is conducted in a grooved channel with periodic mounted different structure. Control of low Reynolds number range(400-1600)

two-dimensional

unsteady laminar flow was analyzed.Three structures of using oblique plate and two curve vanes with different direction was considered to induce the self-sustained oscillations flow. A comparison among different channels was made for streamlines

isothermal

Nusselt number(Nu) and friction factor. The research found that the critical Reynolds number was low

the value is 620

480

400

respectively. And in the channel with the lower critical Reynolds number

the oscillation was drastic. The corresponding performance was strong vortices movement in the groove areas

to create better heat transfer. For the same Reynolds number

the oscillation period of three kinds of channel were roughly equal

but the self-sustained oscillations characteristics were different.The friction factor had different change trend because of the different vortex in the channel. When Reynolds number was over 800

the value of friction coefficient of the GCCV1 and GCCV2 channel was averagely three times as the value of friction coefficient of GCOP channel

while the same trend was also presented in the heat transfer of the three channels.