Model for heat transfer between buffer storage layers. Models conductance of water. An effective heat conductivity is therefore calculated. Used in BufferStorage model.
R. Viskanta, A. KaraIds: Interferometric observations of the temperature structure in water cooled or heated from above. Advances in Water Resources, volume 1, 1977, pages 57-69. Bibtex-Key [R.VISKANTA1977]