4 research outputs found

    Thermal flow associated with low level transient heating on the surface of the skin.

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    <p>(<b>a</b>) Infrared image during heating at a single thermal actuator in an array device on the skin. (<b>b</b>) Finite element modelling results for the distribution of temperature during rapid, low level heating at an isolated actuator on the skin, after 1.2 s of heating at a power of 3.7 mW mm<sup>-2</sup>. (<b>c</b>) Spatial map of the rise in temperature due to transient heating sequentially in each element in the array. The solid black lines are experimental data; the red dashed lines are best fit calculations. The strong rise shown in upper leftmost element results from local delamination of the device from the skin. (<b>d</b>) Experimental data (solid lines) and best fit calculations (dashed lines) for the cheek (black) and heel (blue), along with extracted thermal transport properties.</p

    Anisotropic convective effects associated with near surface blood flow.

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    <p>(<b>a</b>) Spatial map of changes in temperature at each element for a device located at the volar aspect of the wrist. The position of the thermal actuator coincides with a large vein. (<b>b</b>) Difference in temperature between element 11 (E11) and element 3 (E3). The results show effects of anisotropic heat flow in the wrist, compared to isotropic distributions typically observed on a region of the body such as the cheek. The vertical red dashed lines correspond to initiation and termination of heating, respectively.</p