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Unformatted text preview: 190 CHAPTER 2. DIMENSIONAL ANALYSIS 2.42 Chapter 2, Problem 42 Problem: In a dip-coating process, a substrate (strip of material) is dipped into a tank containing coating material, removed from the tank, and allowed to drain. The average thickness of the coating material that adheres to the substrate is h, the viscosity of the coating material is µ, the velocity at which the substrate is removed from the tank is U , the surface tension of the coating material is σ , and the specific weight of the coating material is ρg . Be sure to treat ρg as a single variable to simplify your analysis. How many dimensionless groupings are there? What are the dimensionless groupings? U ........... ......... .......... ............ .......... ............. . .......... ........... ............ .......... ............. ............ ............ . .......... ............ .......... ............. ............ ...... ....... .......... ............ ........... .......... ............ ............ .........
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This note was uploaded on 02/09/2012 for the course AME 309 taught by Professor Phares during the Spring '06 term at USC.

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