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Abstract
The heat transfer through certain liquid crystals can be controlled by applying an external electric field. Because of the electrical conductivity anisotropy, space charge accumulates in certain regions of the liquid crystal when an electric field is applied. The space charge interacts with the field to produce hydrodynamic flow. It is the movement of fluid from one electrode to the other that is responsible for the changes in the heat transfer. Results show that the heat transfer in a certain liquid crystal can be changed by a factor of approximately 40 or more when a very high electric field is applied.