INSTABILITY OF TWO ROTATING VISCOELASTIC (WALTERS B') SUPERPOSED FLUIDS WITH SUSPENDED PARTICLES IN POROUS MEDIUM by

The in sta bil ity of the plane in ter face be tween two Walters B ' viscoelastic superposed flu ids per me ated with sus pended par ti cles and uni form ro ta tion in po rous me dium is con sid ered fol low ing the linearized per tur ba tion the-ory and nor mal mode anal y sis. For the sta ble con fig u ra tion the sys tem is found to be sta ble or un sta ble if n ' < or> k1/e, de pend ing on ki ne matic viscoelasticity, per me abil ity of the me dium and po ros ity of the me dium. How ever, the sys tem is found to be un sta ble for the po ten tially un sta ble con-fig u ra tion. Key words: Ray leigh-Tay lor in sta bil ity, Walters B ' viscoelastic flu ids, sus-pended par ti cles, uni form ro ta tion, po rous me diu