Using dissipative particle dynamics simulation,the viscosity of hydrophobically associating polymer(HAP) solution was studied with different concentrations,temperatures and shear strengths respectively,and the assembly behavior was also simulated in water-oil system.It was found that the assembly behavior of HAP was similar to surfactant.The change of viscosity was attributed to different assembly structure.Lower viscosity was due to intramolecular associating of HAP,and higher value derived from lower diff...