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Figure 9 | BioMedical Engineering OnLine

Figure 9

From: Transport lattice models of heat transport in skin with spatially heterogeneous, temperature-dependent perfusion

Figure 9

Two-dimensional distribution of tissue temperature. Top Left: Image of skin cross-section used in generating the simulation geometry. Scale bar: 50 μ m. (Top Right). The Cartesian grid (ℓ = 1 μ m) is superimposed on the model geometry to create the simulation geometry. Stratum corneum was assigned the same thermal properties as the epidermis. The hot wire is seen as dark blue region with a red tip. Center: A part of the 216 × 188 lattice is shown. At each node, five functional models are connected, four conduction models (M c ) to the neighboring nodes and a fifth model (M s ) representing heat storage and perfusion-transported heat to a reference temperature, T a . Depending on the type of underlying tissue (or air), the transport model at any node is one of four models shown in Fig. 1. The tip of the hot wire was elevated to 45°C at t = 10 s for 50 s with a rise and fall time of 5 s. Bottom Panels: Temperature contours at different time points: before the hot wire tip temperature is raised; just before the hot wire is turned off; immediately after the hot wire is turned off; 10 s later.

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