The optimum number of columns for enrichment of heavy water by thermal diffusion in the Frazier scheme at fixed sum of column heights

The effect of the number of columns on the enrichment of heavy water from water isotope mixture by thermal diffusion in the Frazier scheme at fixed sum of column heights has been investigated. The equations for predicting the optimum number of columns and the corresponding maximum separation have been derived. Considerable enrichment in separation is obtainable if the number of columns, as well as the column height, in a Frazier scheme is properly assigned for a certain flow-rate operation.