Ram Kumar Maity
Thermal Hydraulics Division, Reactor Design & Technology Group Indira Gandhi Centre for Atomic Research, Kalpakkam, India - 603127; Department of Mechanical Engineering, IIT Madras, Chennai-600036, India
Thirumalachari Sundararajan
Thermodynamics and Combustion Engineering
Laboratory Department of Mechanical Engineering
Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
K. Velusamy
Homi Bhabha National Institute, Reactor Design and Technology Group, Thermal Hydraulics Section, Nuclear Systems Division Indira Gandhi Centre for Atomic Research Kalpakkam - 603 102 India
The Volume of Fluid method (VOF) is a popular method for
simulation of two phase flows with interface dynamics and is
one of the more accurate methods. The accuracy of VOF method depends intricately on the schemes employed for interface advection. Interface advection needs to capture the kinematics of two phase interface based on prevailing flow and pressure fields. Most accurate advection methods employ geometric methods that involve complex and relatively costly computations. In the present work a fractional time step based
framework is proposed that can be applied to a geometric
advection scheme. It is demonstrated that there is significant
improvement in the accuracy of some of the simpler geometric
advection schemes with minimal increase in complexity with
respect to implementation and computational effort. The method is implemented on two variants of Eulerian implicit schemes for fluid advection. Performance of the method is discussed with the help standard two phase advection test problems.