calculating special relativistic viscous stress and heat flux tensors

‎the study of the thermodynamics of relativistic fluid is important in astrophysics and modern physics‎. ‎in this paper‎, ‎we calculate two important parameters of the special relativistic fluids which are the viscous stress and heat flux tensors in the cartesian coordinate system‎. ‎we calculated the explicit relations of viscous stress tensor with velocity‎, ‎spatial and time derivative of velocity‎. ‎also‎, ‎the relation of heat flux tensor is derived with velocity‎, ‎temperature and spatial and time derivatives of them‎.‎the components of viscous stress and heat flux tensors in the other coordinates can be derived by the transformation matrix‎.‎we use the relativistic method for deriving the non-relativistic viscous stress and heat flux tensors in the limit of the relativistic method‎. ‎so‎, ‎to improve the accuracy of non-relativistic studies of shear rate‎, ‎viscous stress tensor‎, ‎heat flux vector‎, ‎and heat flux tensor‎, ‎especially in the fast fluids‎, ‎the special relativistic corrections can be used‎.