The problem of gas film lubrication is considered, by assuming the existence of an electrical conductibility for the gas and that the motion is subjected to the influence of external electromagnetic fields. The MGD-lubrication equations are written under a general form. Several external electromagnetic conditions are considered, divided in two classes: (a) transversal magnetic field, and (b) tangential magnetic field combined with transversal electrical field. For each case the pressure differential equation is deduced and the possibilities of obtaining approximate solutions are briefly discussed, as well as the existence of some limiting solutions. Finally, the possibilities of improving the operation of both self-acting and externally pressurized gas bearings are pointed out.

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