Development of a multiscale simulation for thermal lubrication of polymeric liquids

2015 Fiscal Year Final Research Report

• Project/Area Number: 26790080
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Computational science
• Research Institution: University of Hyogo
• Principal Investigator: Yasuda Shugo 兵庫県立大学, シミュレーション学研究科, 准教授 (70456797)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: マルチスケール / 高分子液体 / 熱潤滑

Outline of Final Research Achievements

The synchronized molecular dynamics simulation via macroscopic heat and momentum transfer is developed for the thermal lubrication problems. This method is applied to the lubrication of a polymeric liquid between fast moving parallel plates. The rheological properties and conformation of polymer chains coupled with the local viscous heating are investigated with a non-dimensional parameter, i.e., the Nahme-Griffith number, which is defined by the ratio of the viscous heating to the thermal conduction at the characteristic temperature required to sufficiently change the viscosity. The results also clarify a new transitional phenomenon in the conformational dynamics of polymer chains due to the competition of the flow and thermal agitation.

Free Research Field

計算科学，流体力学