Multiscale space-time methods for thermo-fluid analysis of a ground vehicle and its tires

Kenji Takizawa*, Tayfun E. Tezduyar, Takashi Kuraishi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

98 Citations (Scopus)


We present the core and special multiscale space-time (ST) methods we developed for thermo-fluid analysis of a ground vehicle and its tires. We also present application of these methods to thermo-fluid analysis of a freight truck and its rear set of tires. The core multiscale ST method is the ST variational multiscale (ST-VMS) formulation of the Navier-Stokes equations of incompressible flows with thermal coupling, which is multiscale in the way the small-scale thermo-fluid behavior is represented in the computations. The special multiscale ST method is spatially multiscale, where the thermo-fluid computation over the global domain with a reasonable mesh refinement is followed by a higher-resolution computation over the local domain containing the rear set of tires, with the boundary and initial conditions coming from the data computed over the global domain. The large amount of time-history data from the global computation is stored using the ST computation technique with continuous representation in time (ST-C), which serves as a data compression technique in this context. In our thermo-fluid analysis, we use a road-surface temperature higher than the free-stream temperature, and a tire-surface temperature that is even higher. We also include in the analysis the heat from the engine and exhaust system, with a reasonably realistic representation of the rate by which that heat transfer takes place as well as the surface geometry of the engine and exhaust system over which the heat transfer occurs. We take into account the heave motion of the truck body. We demonstrate how the spatially multiscale ST method, with higher-refinement mesh in the local domain, substantially increases the accuracy of the computed heat transfer rates from the tires.

Original languageEnglish
Pages (from-to)2227-2255
Number of pages29
JournalMathematical Models and Methods in Applied Sciences
Issue number12
Publication statusPublished - 2015 Nov 26


  • Multiscale methods
  • ground vehicle
  • heave motion
  • space-time methods
  • thermo-fluid analysis
  • tires

ASJC Scopus subject areas

  • Modelling and Simulation
  • Applied Mathematics


Dive into the research topics of 'Multiscale space-time methods for thermo-fluid analysis of a ground vehicle and its tires'. Together they form a unique fingerprint.

Cite this