Propagation of regularity and finite-time collisions for the thermomechanical Cucker-Smale model with a singular communication

Young Pil Choi, Seung Yeal Ha, Jeongho Kim

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


We study dynamical behaviors of the ensemble of thermomechanical Cucker-Smale (in short TCS) particles with singular power-law communication weights in velocity and temperatures. For the particle TCS model, we present several sufficient frameworks for the global regularity of solution and a finite-time breakdown depending on the blow-up exponents in the powerlaw communication weights at the origin where the relative spatial distances become zero. More precisely, when the blow-up exponent in velocity communication weight is greater than unity and the blow-up exponent in temperature communication weights is more than twice of blow-up exponent in velocity communication, we show that there will be no finite time collision between particles, unless there are collisions initially. In contrast, when the blow-up exponent of velocity communication weight is smaller than unity, we show that there can be a collision in finite time. For the kinetic TCS equation, we present a local-in-time existence of a unique weak solution using the suitable regularization and compactness arguments.

Original languageEnglish
Pages (from-to)379-407
Number of pages29
JournalNetworks and Heterogeneous Media
Issue number3
Publication statusPublished - 2018 Sep 1

Bibliographical note

Funding Information:
Acknowledgments. The work of Y.-P. Choi is supported by NRF grants (2017R1C1B2012918 and 2017R1A4A1014735), and the work of S.-Y. Ha is supported by the National Research Foundation of Korea (2017R1A2B2001864).

Publisher Copyright:
© American Institute of Mathematical Sciences.

All Science Journal Classification (ASJC) codes

  • Statistics and Probability
  • Engineering(all)
  • Computer Science Applications
  • Applied Mathematics


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