New telemac3d features for v5p5 links from [[:new_version_features|New version features]] \\ ===== v5p4 TELEMAC-3D ===== Date: 3rd June 2004 The principal features of this version v5p4 of TELEMAC-3D are: * Turbulence models revisited: mixing length, damping functions, lateral friction. k-omega model added. ===== New options and new or modified keywords ==== == VERTICAL TURBULENCE MODEL (MODELE DE TURBULENCE VERTICAL) == :The k-omega model has been added: :Integer. The default is 1 :1 : constant viscosity :2 : mixing-length model :3 : k-epsilon :7 : k-omega == HORIZONTAL TURBULENCE MODEL (MODELE DE TURBULENCE HORIZONTAL) == :Integer. The default is 1 :1 : constant viscosity :2 : mixing-length model (not implemented) :3 : k-epsilon :4 : Smagorinski :7 : k-omega == MIXING LENGTH MODEL (MODELE DE LONGUEUR DE MELANGE) == :The variants of the mixing-length turbulence models are now steered by a new key-word :Integer. Default : 1 :1 : Prandtl :2 : :3 : Nezu and Nakagawa : $ \nu_t = ku^*z(1- \frac{z}{h}) $ :4 : jet :5 : Quetin :6 : Tsanis == DAMPING FUNCTION (FONCTION D’AMORTISSEMENT) == :Damping functions are now triggered by a new key-word, and new functions have been added: :Integer. The default is 0 :0 : no damping function :1 : user defined (user SUBROUTINE **DRIUTI**) :2 : Viollet (former default value) :3 : Munk and Anderson : $ (1+aRi)^b $ a=10 b=-0.5 == REGIME DE TURBULENCE POUR LE FOND (TURBULENCE REGIME FOR THE BOTTOM) == :The turbulence model is independent of the bottom friction, with their own key-words :Integer. The default : 2 :1 : smooth :2 : rough == LAW OF BOTTOM FRICTION (LOI DE FROTTEMENT SUR LE FOND) == :Lateral and bottom friction velocities are now treated in exactly the same way, and independently of the turbulence model, with their own key-words :Integer. The default is 2 :0 : no friction :1 : Haaland :2 : Chézy :3 : Strickler :4 : Manning :5 : Nikuradse :If regime is rough the relevant coefficient is given by the key-word: :**FRICTION COEFFICIENT FOR THE BOTTOM** (COEFFICIENT DE FROTTEMENT POUR LE FOND) == TURBULENCE REGIME FOR THE LATERAL BOUNDARIES (REGIME DE TURBULENCE POUR LES PAROIS LATERALES) == :Integer. Default : 2 :1 : smooth :2 : rough :If regime is rough : == LAW OF FRICTION ON LATERAL BOUNDARIES (LOI DE FROTTEMENT SUR LES PAROIS LATERALES) == :Integer. Default : 2 :0 : no friction (but AUBORL is taken in the boundary conditions file and may be different from 0 if modified by the user) :5 : Nikuradse :The relevant coefficient is given by the key-word: :**FRICTION COEFFICIENT FOR THE LATERAL BOUNDARIES** (COEFFICIENT DE FROTTEMENT POUR LES PAROIS LATERALES) == OPTION FOR THE HYDROSTATIC STEP (OPTION POUR L’ETAPE HYDROSTATIQUE) == :Wave equation in 3D: new algorithm for the hydrostatic step, no call to TELEMAC-2D :1 : as before :2 : wave equation :A notable speed-up, nearly a factor 2 in hydrostatic mode, but sometimes unstable. When unstable, may be stabilized by setting : **IMPLICITATION FOR DIFFUSION = 2.**, but this is not yet fully investigated, at least safe when looking for a steady state. ===== New user subroutine and modifications in user subroutines ===== == Q3D == :All comment in English