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Relaxation Parameters
Irina edited this page Jun 5, 2019
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4 revisions
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relaxation_steps (default 0)
- Number of iterations for relaxation
- Typical values depend on relaxation timescales of the problem and value of β in the relaxation force;
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relaxation_beta (default 10-6)
- Parameter in relaxation force that leads to a change in velocities of dv/dt = -(β + γ v2) v
- Should be positive and on the order of 1/τ where τ is a problem-dependent relaxation time scale
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relaxation_gamma (default 0)
- Parameter in relaxation force that leads to a change in velocities of dv/dt = -(β + γ v2) v
- Should be positive and on the order of 10-2 β/⟨δv2⟩ where ⟨δv2⟩ is the amplitude of velocity fluctuations
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relaxation_repulsion_radius (default 0.25)
- Introduces particle repulsion if particles are closer than the radius to prevent particle pairing
- In units of smoothing length
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relaxation_repulsion_gamma (default 0)
- Related to strength of particle repulsion if they are within the repulsion radius