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Soil Heat Flux Plates

Heat Flow Distortion and Thermal Contact Resistance

^a USDA-ARS, National Soil Tilth Lab., 2150 Pammel Dr., Ames, IA 50011-3120
^b USDA-ARS, Soil and Water Management Research Unit, St. Paul, MN 55108
^c Dep. of Agronomy, Iowa State Univ., Ames, IA 50011

View larger version (17K): [in this window] [in a new window]   Fig. 1. Cross-section of laboratory heat flow chamber.

View larger version (31K): [in this window] [in a new window]   Fig. 2. Corrected plate heat flux density (Gm) for four plate designs vs. known heat flux density (G) in dry and saturated quartz sand using manufacturer-specified and measured plate dimensions and thermal conductivities (m). Original flux plate data taken from Sauer et al. (2003).

View larger version (43K): [in this window] [in a new window]   Fig. 3. (Top) mean heat flux density of triplicate control and heat sink compound-coated flux plates in Waukegan silt loam and (bottom) the ratio of plate heat flux density (Gm) for plates with and without water-soluble heat sink compound.

View larger version (45K): [in this window] [in a new window]   Fig. 4. (Top) mean heat flux density of triplicate control and heat sink compound-coated flux plates in Waukegan silt loam and (bottom) the ratio of plate heat flux density (Gm) for plates with and without Arctic Silver 5 heat sink compound.