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Verification of Computational Methods of Modeling Evaporative Drops

Verification of Computational Methods of Modeling Evaporative Drops. By Abraham Rosales Andrew Christian Jason Ju . Abstract . This project presents theoretical, computational, and experimental aspects of mass-loss of fluid drops due to evaporation. . Overview. Applications

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Verification of Computational Methods of Modeling Evaporative Drops

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  1. Verification of Computational Methods of Modeling Evaporative Drops By Abraham Rosales Andrew Christian Jason Ju

  2. Abstract This project presents theoretical, computational, and experimental aspects of mass-loss of fluid drops due to evaporation.

  3. Overview • Applications • Experimental Setups and Procedures • Experimental Results • Derivation of Methodology • Numerical Results • Discussion of Disparities

  4. Evaporation Process

  5. Applications • Manufacturing computer chips • Influence conductivity of electrons • Lubrication or cleaning of machinery • Duration of the fluid • Printing process • Spreading and drying time.

  6. Experimental Setup

  7. software

  8. Video of 100% IPA Evaporation

  9. Experimental Results for 100% Isopropyl Alcohol

  10. Video of Water Evaporation

  11. Experimental Results for Water

  12. Experimentally Determined Evaporation Constant

  13. Conceptual and Theoretical Derivations

  14. Conceptual and Theoretical Derivations • Reduce Navier stokes equation (lubrication approximation) • Re << 1, ignore inertia term • Incompressible fluid. • For detail derivations see (instabilities in Gravity driven flow of thin fluid films by professor Kondic)

  15. Conceptual and Theoretical Derivations

  16. Derivations: Van Der Waal Forces

  17. Van Der Waal Approximation:Lennard Jones Potential  In our use:

  18. Derivations: Evaporation

  19. Numerical Scheme:Forward Time, Central Space

  20. Numerical Scheme:All Together + CoOrdinate Foolishness

  21. Results: 100% Alcohol

  22. Results: 100% Alcohol

  23. Disparities:

  24. Results: 100% Alcohol

  25. Disparities:

  26. Disparities:

  27. Water Issues:

  28. Mixology Issues:

  29. Conclusion • Mass loss fits for fluids which behave within lubrication approximation. • Surface tension term keeps area similar regardless of intermolecular forces. • Things not within approximation:Combinations of liquidsHigh contact angles

  30. Questions and Answers

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