cerebral aneurysm is known to be related with flow dynamics in its initiation, growth and rupture, however, its direct role is still poorly understood. thus, a research using CFD, especially in an attempt to bring it into clinical medicine, is proposed. To do so, CFD is to be validated using animal experiment data and clinical data as well. This research brings us a particular flow marker in cerebral aneurysm diagnostics and treatment decision-making process.