Publication

Heat transfer in Interverterbral Discs (IVDs)

2011
Student Projects

Abstract

The Nucleus Pulposus (NP) is an avascular tissue that may be subject to temperature increase. Indeed, since the NP is not perfused by the cardio-vascular system, it implies that heat cannot be convected from it. The sources of heat could be either external due to the musculature that surrounded the spine, or internal due to viscous dissipations. The overall goal of the project is to characterize heat transfer in the intervertebral disc (IVD). For that purpose, the student will asked to develop a system that will dissipate heat specifically in the center of an IVD and that can also monitor the evolution of temperature, with controlled boundary conditions. The data will then be used to determine the mechanical stimulus required to have an increase of temperature due to viscous dissipation. This latter prediction will be validated experimentally.

Official source

https://infoscience.epfl.ch/entities/publication/a42ad87a-9457-497d-934c-0de2efc1c528

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2011
Student Projects

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/a42ad87a-9457-497d-934c-0de2efc1c528

About this result

Related concepts (32)

Heat transfer

Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy (heat) between physical systems. Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes. Engineers also consider the transfer of mass of differing chemical species (mass transfer in the form of advection), either cold or hot, to achieve heat transfer.

Heat

In thermodynamics, heat is the thermal energy transferred between systems due to a temperature difference. In colloquial use, heat sometimes refers to thermal energy itself. An example of formal vs. informal usage may be obtained from the right-hand photo, in which the metal bar is "conducting heat" from its hot end to its cold end, but if the metal bar is considered a thermodynamic system, then the energy flowing within the metal bar is called internal energy, not heat.

Temperature

Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured with a thermometer. Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for definition. The most common scales are the Celsius scale with the unit symbol °C (formerly called centigrade), the Fahrenheit scale (°F), and the Kelvin scale (K), the latter being used predominantly for scientific purposes.

Related publications (32)

Heat transfer in Interverterbral Discs (IVDs)

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