  We investigate the dependence of the thermal Casimir force between two
graphene sheets on the drift velocity of the electrons in one graphene sheet.
We show that the drift motion produces a measurable change of the thermal
Casimir force due to the Doppler effect. The thermal Casimir force as well as
the Casimir friction are strongly enhanced in the case of resonant photon
tunneling when the energy of the emitted photon coincides with the energy of
electron-hole pair excitations. In the case of resonant photon tunneling, even
for temperatures above room temperature the Casimir friction is dominated by
quantum friction due to quantum fluctuations. Quantum friction can be detected
in frictional drag experiment between graphene sheets for high electric field.
