Measurement of transient temperature field within a falling droplet

Fluorescence shift thermometry has been combined with droplet slicing imagi ng to capture images of the transient temperature field within a 500-mu m-d iam decane droplet falling into 370-420 degrees C nitrogen. The temperature held becomes almost homogeneous within 5-10 ms of entry into the hot ambie nt gas and rises toward the boiling point of the liquid over 50-100 ms. The constraints faced in time design of such an experiment and the protocols r equired for successful measurement of such temperature images are addressed .