Physically consistent models for artificial dissipation in transonic potential flow computations Conference

Dulikravich, GS, Mortara, KW, Marraffa, L. (1988). Physically consistent models for artificial dissipation in transonic potential flow computations .

cited authors

  • Dulikravich, GS; Mortara, KW; Marraffa, L

abstract

  • The effects that artificial dissipation has on numerical solutions of the transonic Full Potential Equation (FPE) are investigated by comparing the artificially dissipative FPE to a Physically Dissipative Potential (PDP) equation. Analytic expressions were derived for the variables C and Mc that are used in the artificial density formulation. It was shown that these new values generate artificial dissipation which is equivalent to the physical dissipation which exists in the PDP equation. The new expressions for the variables C and Mc can easily be incorporated into the existing full potential codes which are based either on the artificial density or on the artificial viscosity formulation. A comparison of Physically Dissipative Potential (PDP), Artificial Density or Viscosity (ADV), Artificial Mass Flux (AMF), and ADV with variable C and Mc formulation (MCC) is also presented.

publication date

  • January 1, 1988