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Table 2 Measurements carried out in the four zones of the droplets. Average values from six droplets with at least three measurements for zone and droplet

From: Influence of substrate and temperature on the crystallization of KNO3 droplets studied by infrared thermography

  Black tape (mm) Glass (mm) Sawed marble (mm) Polished marble (mm)
Zone 20 °C 50 °C 75 °C 20 °C 50 °C 75 °C 20 °C 50 °C 75 °C 20 °C 50 °C 75 °C
A 2.2 1.2 0.6 3.3 1.0 / 1.6 0.8 / 2.1 1.1 /
B 3.7 3.9 3.6 6.6 2.8* / 5.8 3.2 2.8 4.8 4.1* 2.6
C 1.6 0.8 1.1 2.2* 1.7 11.4* / 0.9 0.8 2.4 2.1 0.6
D 0.1* 1.0 0.8 0.2* 0.4* 1.2* / / / 0.5* / 1.6
  1. A, average of acicular crystals; B, circle diameter; C, average of efflorescence ratio; D, average of halo ratio; * not visible in all the droplets