TY - GEN A1 - Frauhammer, Jörg A1 - Klein, Harald A1 - Eigenberger, Gerhart A1 - Nowak, Ulrich T1 - Solving moving boundary problems with an adaptive moving grid method: Rotary heat exchangers with condensation and evaporation N2 - 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. T3 - ZIB-Report - SC-96-57 Y1 - 1996 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-2679 ER -