Numerical solution of multi-variable cell population balance models: I. Finite difference methods

Nikolaos V. Mantzaris, Prodromos Daoutidis, Friedrich Srienc

Research output: Contribution to journalArticlepeer-review

96 Scopus citations

Abstract

Multi-variable cell population balance models represent the most accurate and general way of describing the complicated phenomena associated with cell growth, substrate consumption and product formation due to the level of detail included in them. Therefore, the ability to solve and understand such models is of fundamental importance in predicting and/or controlling cell growth in processes of biotechnological interest. However, due to the fact that such models typically consist of first-order, partial integro-differential equations coupled in a nonlinear fashion with ordinary integro-differential equations, their solution poses a serious challenge. In this work, we have developed several finite difference algorithms for the solution of the problem in its most general formulation (i.e. for any set of single-cell physiological state functions). The validity of the developed algorithms was verified by comparing their results with those of three specific test problems for which several solution characteristics are known. Moreover, the numerical schemes were compared to each other with respect to their key numerical features, such as stability, accuracy and computational speed. Solutions of the cell population balance model with up to three state variables were obtained using a Pentium II 450 MHz PC in tractable CPU times.

Original languageEnglish (US)
Pages (from-to)1411-1440
Number of pages30
JournalComputers and Chemical Engineering
Volume25
Issue number11-12
DOIs
StatePublished - Nov 15 2001

Bibliographical note

Funding Information:
We thank the Graduate school of the University of Minnesota for awarding N.V.M a dissertation fellowship. Financial support by the National Science Foundation through the grant NSF/CTS-9624725, NSF/BES-9708146 and NSF/EES-9319380 is also gratefully acknowledged. Appendix A

Keywords

  • Cell growth
  • Cell population balance
  • Finite differences
  • Numerical solution
  • Numerical stability
  • Substrate consumption

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