Wavelet-based surrogate time series for multiscale simulation of heterogeneous catalysis
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Arizona, Tucson, AZ (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Virginia Polytechnic Institute and State Univ., Blacksburg, VA (United States)
- Virginia Polytechnic Institute and State Univ., Blacksburg, VA (United States)
- SABIC, Sugar Land, TX (United States)
We propose a wavelet-based scheme that encodes the essential dynamics of discrete microscale surface reactions in a form that can be coupled with continuum macroscale flow simulations with high computational efficiency. This makes it possible to simulate the dynamic behavior of reactor-scale heterogeneous catalysis without requiring detailed concurrent simulations at both the surface and continuum scales using different models. Our scheme is based on the application of wavelet-based surrogate time series that encodes the essential temporal and/or spatial fine-scale dynamics at the catalyst surface. The encoded dynamics are then used to generate statistically equivalent, randomized surrogate time series, which can be linked to the continuum scale simulation. As a result, we illustrate an application of this approach using two different kinetic Monte Carlo simulations with different characteristic behaviors typical for heterogeneous chemical reactions.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1238745
- Alternate ID(s):
- OSTI ID: 1346425
- Journal Information:
- Chemical Engineering Science, Vol. 144, Issue C; ISSN 0009-2509
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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