“…These materials are representative of angular, poorly graded sands with d 10 , d 30 , and d 60 values of 0.75, 1.16, and 1.75 mm, respectively, for the coarse gradation and 0.13, 0.27, and 0.45 mm, respectively, for the fine gradation (Peters et al, 2011). The combination of fused quartz media and an oil mixture was used by Siemens et al (2013, 2014) and Siemens and Oldroyd (2014) to investigate unsaturated moisture migration in one‐ and two‐dimensional systems as well as by Siemens et al (2015) in heat transport experiments.…”