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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Johnston, Joseph Selvam, R. Panneer |
| Copyright Year | 2011 |
| Abstract | Heterogeneous vapor bubble nucleation was numerically simulated on surfaces containing nanometer-sized rectangular cavities of various sizes (ranging from 2.72–9.36 nm width & 4.09–8.34 nm depth). Non-equilibrium molecular dynamics simulations at constant wall temperature were carried out for the two-dimensional (2D) Lennard-Jones (LJ) fluid which was in thermal contact with LJ solid wall. Nucleation was induced by expanding the system volume to a metastable state while keeping the temperature of the solid wall constant. When the aspect ratio (depth-to-width) of the cavity was large (∼3-to-1), the nucleation rate was increased nearly three-fold compared to the flat surface for relatively large wettability; however, the nucleation rate was nearly the same for lower wettability surfaces. Nucleation was generally favored within the cavities due to the stabilization of the cavity side-walls. The value of cutoff radius, wall temperature, and solid-liquid wettability was varied to determine their effect on nucleation rate. The 2D model was validated by comparing thermodynamic averages of pressure and potential energy to predicted values from a 2D LJ equation of state. |
| Sponsorship | Heat Transfer Division |
| File Format | |
| ISBN | 9780791838921 |
| DOI | 10.1115/AJTEC2011-44188 |
| e-ISBN | 9780791838945 |
| Conference Proceedings | ASME/JSME 2011 8th Thermal Engineering Joint Conference |
| Language | English |
| Publisher Date | 2011-03-13 |
| Publisher Place | Honolulu, Hawaii, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Wall temperature Potential energy Cavities Bubbles Fluids Temperature Equations of state Equilibrium (physics) Vapors Molecular dynamics simulation Pressure Nucleation (physics) |
| Content Type | Text |
| Resource Type | Article |
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