@misc{FrauhammerKleinEigenbergeretal., author = {Frauhammer, J{\"o}rg and Klein, Harald and Eigenberger, Gerhart and Nowak, Ulrich}, title = {Solving moving boundary problems with an adaptive moving grid method: Rotary heat exchangers with condensation and evaporation}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-2679}, number = {SC-96-57}, abstract = {A numerical method for the treatment of moving discontinuities in the model equations of chemical engineering systems is presented. The derived model describing the effects of condensation and evaporation in a regenerative air to air heat exchanger yields an illustrative example for these so called moving boundary problems. The presented adaptive moving grid method is based on the algorithm {\sc Pdex} for parabolic partial differential equations. It is shown that the method is suited for problems where the arising discontinuities cause low rates of convergence if the equations are solved with a static grid.}, language = {en} }