Flow force and torque on submerged bodies in lattice-Boltzmann via momentum exchange
نویسندگان
چکیده
We present a new derivation of the momentum exchange algorithm first introduced by Ladd [12], to compute the flow force and torque on a submerged body. The starting point of our derivation is to consider the time derivative of the total momentum of a virtual fluid system that replaces the submerged body in the real problem. The new derivation gives, in turn, some correction terms to the original algorithm. We also present numerical tests that support the correctness of the formulas derived.
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