FXI Boundary Conditions(multi-phase) Action 网回区 Component Detais for Fluid, mixture Fluid Boundary New Fluid Components Existing Fluid Boundaries VaL V Mass fraction Boundary Condition values Close Flow Regime Subsonic Mass and Momentum efer Coordinate Frame Normal Sp Coordi Val. V Normal Speed in values Default Intensity and Autocompute Length Scale List Edtor Auto Execute Additional variable Apply Close Expression Edtor CFX5.5 V5.5.1H 2001AEA Technology
CFX 5.5 V5.5.1H © 2001AEA Technology 6-6 Boundary Conditions (multi-phase)
CFX! Inlet/outlet Bounday Condion Va油s Inlets/outlets Flow is allowed into domain for inlet or out of domain for outlet Artificial walls are built to Dfat identy wo Au carere Leram scaw prevent reverse flow Hea Transter Need to specify some of the E:tc lemerre following quantities at the inlet velocity, total/static pressure, mass flow rate, temperature turbulent quantities, additional scalars. mass fractions and a Boundary Condition Values volume fractions Flow Rear For rotating frame of reference Subsonic all velocities are in rotating Mass and Momentum Notmal Speed frame(except for the case when esian Velocity Component Val v total pressure in stationary Average Static Pressute frame is specified along with dose xpression Ector velocity component direction) CFX5.5V5.5.1H 2001AEA Technology
CFX 5.5 V5.5.1H © 2001AEA Technology 6-7 Inlet/Outlet Inlets/Outlets - Flow is allowed into domain for inlet or out of domain for outlet - Artificial walls are built to prevent reverse flow - Need to specify some of the following quantities at the inlet: velocity, total/static pressure, mass flow rate, temperature, turbulent quantities, additional scalars, mass fractions and volume fractions - For rotating frame of reference all velocities are in rotating frame (except for the case when total pressure in stationary frame is specified along with velocity component direction)
CFX! Degassing Outlet for Multi-phase Mixed boundary conditions are required to account for simulations where one fluid may flow out ofor Flow Regime into the domain through the Subsonic boundary but other fluids may not - Flow specifcation This is a typical requirement of bubble column applications where gas extraction occurs at a boundary c」 Expression E-」 Some settling and filtration applications require addition or removal of a continuous phase from a dispersed phase In practice, the boundary may be treated as an inlet or outlet for those fluids may move across the boundary, and a no flow boundary for those that may not CFX5.5 V5.5.1H 2001AEA Technology
CFX 5.5 V5.5.1H © 2001AEA Technology 6-8 Degassing Outlet for Multi-phase Mixed boundary conditions are required to account for simulations where one fluid may flow out of or into the domain through the boundary but other fluids may not This is a typical requirement of bubble column applications where gas extraction occurs at a boundary Some settling and filtration applications require addition or removal of a continuous phase from a dispersed phase In practice, the boundary may be treated as an inlet or outlet for those fluids may move across the boundary, and a no flow boundary for those that may not
CFX! Opening BOundarycOndition Values 二回区 Openings Flow Regime Mixed flow permitted Mass and Momentum pecified pressure deemed total when flow is in Specified pressure deemed ow Direction Normal to Boundary static when flow is out Loss Coefficient Can also specify cartesian T Specify Loss Coefficient velocity components Turbulence Default Intensity and Autocompute Length Scale Useful when the exact flow Heat Transfer conditions are unknown Static Temperature Temperature Addtional variables Expression Editor CFX5.5 V5.5.1H 2001AEA Technology
CFX 5.5 V5.5.1H © 2001AEA Technology 6-9 Opening Openings - Mixed flow permitted - Specified pressure deemed total when flow is in - Specified pressure deemed static when flow is out - Can also specify Cartesian velocity components - Useful when the exact flow conditions are unknown