subroutine Fluid_Flow_Solver
    
    Use GeoElements_FluidModule
    Use UTUBEVARS
    USE KickVariables
    USE PressureDisplayVARIABLES
    USE FricPressDropVars
    USE MudSystemVARIABLES
    USE Fluid_Flow_Startup_Vars
    USE CError
    
    implicit none
    INTEGER :: FlowDuration
    Integer :: qwer
    integer,dimension(8) :: FlowStartTime,FlowEndTime
    
    !WRITE (*,*) ' fluid flow pointer 1'
    CALL TD_MainCalculations
    
    Call MeshGeneration_FluidModule
    
    !WRITE (*,*) ' fluid flow pointer 2'
    
    MudSystemDotFluidFlowCounter = MudSystemDotFluidFlowCounter + 1
     
    call CirculationCodeSelect
    

    CALL WellPressureDataTransfer
        
    CALL FormationInformationCalculator
        
    DO KickIteration = 1 , 40

        !WRITE (*,*) ' Kick Iteration', KickIteration
        
        CALL PressureAnnAndOHDistribution
            
        IF (NoGasPocket > 0) THEN
            !KickCorrectionVector(:) = 1.
            CALL GasKickCalculator
        END IF
            
        IF (NoGasPocket == 0 .OR. NOT(WellHeadOpen)) EXIT
        IF(MAXVAL(ABS(KickVandPFunction(:))) < KickConvergenceTolerance) EXIT
        !IF(MAXVAL(ABS(KickCorrectionVector(:))) < KickConvergenceTolerance) EXIT
            
            
    END DO
                
    CALL PressureHorizAndStringDistribution
        
    IF (KickIteration == 41) THEN
        WRITE (*,*) ' KickCorrectionVector ' , KickCorrectionVector
        WRITE (*,*) ' Kick Jacobian = ', KickJacobian
    END IF
                
end subroutine