Multiphysics Studies

Simulations and Calculations Required for Multiphysics Studies

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Strongly-Coupled Multiphysics Simulations

In our particle accelerator applications, thermal, mechanical, fluid-dynamic, and electromagnetic problems are often strongly coupled.

For finite element simulations, we usually adopt COMSOL for this type of strongly coupled analyses.

EXAMPLES OF CALCULATIONS

Crab Cavities: Fundamental Power Coupler (FPC)

  • An FPC brings power to RF cavities. During operation, it is subjected to temperature increases due to the Joule effect.
  • The temperature variation depends on both the spatial distribution and the electrical resistivity, which itself is a function of temperature.
  • Need of an electro-thermal strongly coupled simulation to design the equipment.

HL-LHC Collimators: Evaluation of thermal performance of bolted/brazed interfaces

In thermomechanical problems, one key parameter is the thermal conductance (TCC) at the contacts between different bodies, which is difficult to measure and estimate.

For HL-LHC collimators, this problem is addressed using coupled thermal, fluid-dynamic, and structural simulations aimed at reproducing:

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