from __future__ import print_function, absolute_import, division 
DISPLACEMENT_X = "DISPLACEMENT_X"
DISPLACEMENT_Y = "DISPLACEMENT_Y"
ROTATION = "ROTATION"
DISPLACEMENT = ["DISPLACEMENT",DISPLACEMENT_X, DISPLACEMENT_Y]
VELOCITY_X = "VELOCITY_X"
VELOCITY_Y = "VELOCITY_Y"
VELOCITY = ["VELOCITY",VELOCITY_X,VELOCITY_Y]
REACTION_X = "REACTION_X"
REACTION_Y = "REACTION_Y"
REACTION = ["REACTION",REACTION_X, REACTION_Y]
YOUNG_MODULUS = "YOUNG_MODULUS"
POISSON_RATIO = "POISSON_RATIO"
DENSITY = "DENSITY"
VISCOSITY = "VISCOSITY"
TIME = "TIME"
DELTA_TIME = "DELTA_TIME"
TEMPERATURE = "TEMPERATURE"
CONDUCTIVITY = "CONDUCTIVITY"
VOLUME_HEAT_SOURCE = "VOLUME_HEAT_SOURCE"
PRESSURE = "PRESSURE"
BODY_FORCE_X ="BODY_FORCE_X"
BODY_FORCE_Y = "BODY_FORCE_Y"
BDF_COEFFICIENTS = "BDF_COEFFICIENTS"
IS_LAGRANGIAN = "IS_LAGRANGIAN"
EXTERNAL_FORCE_X = "EXTERNAL_FORCE_X"
EXTERNAL_FORCE_Y = "EXTERNAL_FORCE_Y"
EXTERNAL_MOMENT = "EXTERNAL_MOMENT"
EXTERNAL_FORCE = ["EXTERNAL_FORCE",EXTERNAL_FORCE_X, EXTERNAL_FORCE_Y]
EXTERNAL_UNIT_DENSITY = "EXTERNAL_UNIT_DENSITY"
FACE_HEAT_FLUX = "FACE_HEAT_FLUX"
FSI_INTERFACE = "FSI_INTERFACE"
SECTION_TYPE = "SECTION_TYPE"
MOMENT_INERTIA_AREA = "MOMENT_INERTIA_AREA"
LINE_LOAD_X = "LINE_LOAD_X"
LINE_LOAD_Y = "LINE_LOAD_Y"
