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lattice Boltzmann (again)

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Old   August 21, 2000, 13:24
Default lattice Boltzmann (again)
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Pei-Ying Hsieh
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Hi,

Can someone tell me how to relate the physical variables (real world variables) to the non-dimensional variables in the lattice Boltzmann equations (such as, viscosties, domain length, ime, density, velocities, surface tension,...)? Thanks!

For transient problem, is there a constraint on delta t? (delta t is 1 in LBE, right?)

Pei-Ying Hsieh
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Old   August 23, 2000, 18:21
Default Re: lattice Boltzmann (again)
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benjamin
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Hi, you could read

Naoki Takada, Michihisa Tsutahara Evolution of viscous flow around a suddenly rotating circular cylinder in the lattice boltzmann method Computers & Fluids vol 27 no 7 pp807-828 (1998)

you have to scale the viscosity (related to the relaxation parameter) with the time step and the space increment.

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