The anatomy of a channel-fed ‘a‘ā lava flow system

Abstract

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Adaptation of a Thermorheological Lava Flow Model for Venus Conditions

“…Compositional differences between the atmosphere of Earth and Venus affect its specific heat capacity. For terrestrial lava flows, a specific heat capacity of 1,099 J/kg/K is commonly used (e.g., Harris & Rowland, 2001; Harris et al., 2022; Ramsey et al., 2019). Here, we use 1,181 J/kg/K based on the reported atmospheric composition (Lebonnois et al., 2010).…”

“…Our goal is to determine an average emplacement time and cooling rate of these flows to provide a baseline estimate for the planned future missions. FLOWGO is a robust, easily adapted, and well‐tested thermorheological model with a long history of Earth (e.g., Harris & Rowland, 2001; Harris et al., 2022; Ramsey et al., 2019; Rhéty et al., 2017; Rowland et al., 2005; Wantim et al., 2013; Wright et al., 2008) and Mars applications (e.g., Flynn et al., 2022; Rowland et al., 2002, 2004). This one‐dimensional model computes the thermal budget of a control volume of lava in a channel and tracks the resulting cooling, viscosity, and velocity down a slope for a given constant effusion rate.…”