Motivated by inconveniences of present hybrid methods,a gradient-augmented hybrid interface capturing method（GAHM） is presented for incompressible two-phase flow.A front tracking method（FTM） is used as the skeleto...Motivated by inconveniences of present hybrid methods,a gradient-augmented hybrid interface capturing method（GAHM） is presented for incompressible two-phase flow.A front tracking method（FTM） is used as the skeleton of the GAHM for low mass loss and resources.Smooth eulerian level set values are calculated from the FTM interface,and are used for a local interface reconstruction.The reconstruction avoids marker particle redistribution and enables an automatic treatment of interfacial topology change.The cubic Hermit interpolation is employed in all steps of the GAHM to capture subgrid structures within a single spacial cell.The performance of the GAHM is carefully evaluated in a benchmark test.Results show significant improvements of mass loss,clear subgrid structures,highly accurate derivatives（normals and curvatures） and low cost.The GAHM is further coupled with an incompressible multiphase flow solver,Super CE/SE,for more complex and practical applications.The updated solver is evaluated through comparison with an early droplet research.展开更多
采用腐蚀深度法和质量损失法分别对6×××系铝合金的晶间腐蚀敏感性进行评价,并借助金相显微镜和扫描电镜对晶间腐蚀形貌和腐蚀产物进行观察和分析,从而选择适宜的晶间腐蚀评价方法。结果表明:6×××系铝合...采用腐蚀深度法和质量损失法分别对6×××系铝合金的晶间腐蚀敏感性进行评价,并借助金相显微镜和扫描电镜对晶间腐蚀形貌和腐蚀产物进行观察和分析,从而选择适宜的晶间腐蚀评价方法。结果表明:6×××系铝合金具有一定的晶间腐蚀敏感性,其评价方法宜选择腐蚀深度法,腐蚀溶液为57gNaCl+10mLH_(2)O_(2)/1000m L H_(2)O,腐蚀温度为30℃,时间为24h。展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.10972010,11028206,11371069,11372052,11402029,and 11472060)the Science and Technology Development Foundation of China Academy of Engineering Physics(CAEP),China(Grant No.2014B0201030)the Defense Industrial Technology Development Program of China(Grant No.B1520132012)
文摘Motivated by inconveniences of present hybrid methods,a gradient-augmented hybrid interface capturing method（GAHM） is presented for incompressible two-phase flow.A front tracking method（FTM） is used as the skeleton of the GAHM for low mass loss and resources.Smooth eulerian level set values are calculated from the FTM interface,and are used for a local interface reconstruction.The reconstruction avoids marker particle redistribution and enables an automatic treatment of interfacial topology change.The cubic Hermit interpolation is employed in all steps of the GAHM to capture subgrid structures within a single spacial cell.The performance of the GAHM is carefully evaluated in a benchmark test.Results show significant improvements of mass loss,clear subgrid structures,highly accurate derivatives（normals and curvatures） and low cost.The GAHM is further coupled with an incompressible multiphase flow solver,Super CE/SE,for more complex and practical applications.The updated solver is evaluated through comparison with an early droplet research.
文摘采用腐蚀深度法和质量损失法分别对6×××系铝合金的晶间腐蚀敏感性进行评价,并借助金相显微镜和扫描电镜对晶间腐蚀形貌和腐蚀产物进行观察和分析,从而选择适宜的晶间腐蚀评价方法。结果表明:6×××系铝合金具有一定的晶间腐蚀敏感性,其评价方法宜选择腐蚀深度法,腐蚀溶液为57gNaCl+10mLH_(2)O_(2)/1000m L H_(2)O,腐蚀温度为30℃,时间为24h。
