A decanter centrifuge comprises a bowl (12) rotatable about a longitudinal axis, the bowl being provided with a cake discharge opening (18) at one end and a liquid phase discharge opening (20). The bowl has a cylindrical portion (28) and a beach portion (42) disposed between the cylindrical portion and the cake discharge opening. A beach area is provided on an inner surface of the bowl at the beach portion of the bowl, the beach area including a first section and a second section with the second section located between the first section and the cake discharge opening. The second section of the beach area has a less steep or smaller slope than the first section. A conveyor (14) is at least partially disposed inside the bowl for rotation about the longitudinal axis at an angular speed different from an angular rotational speed of the bowl. The conveyor includes a helical screw (24) disposed inside the bowl for scrolling a deposited solids cake layer along the inner surface of the bowl towards the cake discharge opening. A feed element (10) extends into the bowl and the conveyor for delivering a feed slurry into a pool (11) inside the bowl. A flow control structure (30,34,36,40) is provided in the bowl proximate to the second section of the beach area for impeding a flow of cake along the bowl towards the cake discharge opening.
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