plug flow regime in practice this does not happen in fact arrows 16 18 illustrate the flow path of liquor inside the digester and line 20 illustrates the resulting flow pattern of liquor inside digester 10 as stated above this condition leads to inconsistencies in the pulp chemical interface and problems in removing cooked pulp from the digester according to the present invention three modifications can be made to a displacement batch digester to mitigate the problems discussed above the first is a liquor distribution channel placed at or above the bottom tangent knuckle line of the digester the second is the use of liquor distribution channels placed on the bottom of the digester cone to distribute liquor and to help mitigate the formation of a large vortex during discharge or to inject liquors to entice plug flow the third is to add a top shower head to keep the pulp on the top of the discharging mass diluted and to break up the flocs which has been tested as shown in fig2 a generally circular or toroidal distribution channel or pipe 22 is put inside the digester 10 at or above the digester tangent or knuckle line 26 the tangent or knuckle line 26 is the location where an upper generally cylindrical portion 11 of digester 10 is joined to a lower or generally conical section 13 a pipe man way or outlet 15 is.