21. However, these equations only apply when the drop size is sufficiently large compared with the surface roughness scale. 22. Often several measurement locations in a spray are necessary because the drop size varies over the spray cross-section. 23. The three most widely used methods of drop size measurements are laser diffraction, optical imaging, and phase Doppler. 24. To minimize the drop size pour the oil into the cap and lightly shake cap over the platter or basket. 25. A drop size test is repeatable if the data from individual tests do not deviate by more than ?0 %. 26. If all the drops had the same velocity, the measurements of drop size would be the identical for all methods. 27. From the studies of Marshall and Palmer on the drop size distribution of rain drops, it is possible to find VIL: 28. An increase in spray angle will reduce the drop size, whereas a reduction in spray angle will increase the drop size . 29. Recent advances in instrumentation for drop size , drop velocity, and quantified spray pattern continue to result in advances in the state-of-the-art. 30. An increase in spray angle will reduce the drop size , whereas a reduction in spray angle will increase the drop size.
