Hello friends, I put aside my work for a while and I forgot what value to modify to force the tires to heat up 1) with the increase in speed, and 2) friction in the curves.
Hi, mate the factors influencing heating in TGM file are these: Realtime section DegradationPerUnitHistory=(Degradation per heat history step, up to 32 values InternalGasHeatTransfer=(.........................) // (base, mult, power) - heat transfer coefficients to internal gas cavity = base+(mult*(vel^power)), where vel is linear velocity of tire ExternalGasHeatTransfer=(..............) // (base, mult, power) - heat transfer coefficients to external air = base+(mult*(vel^power)), where vel is linear velocity of tire TireRadiationEmissivity=....... // thermal radiation emissivity for external tire surface The optimum, and starting temperature of tyre is however in TBC compound: Temperatures=(.......,........) // Optimum operating temperature for peak forces (Celsius), starting temperature
A big thank you Nicolas for the memory ;-). Can someone give me details on the action of the three values of "InternalGasHeatTransfer=(a........,b........,c.........) "
The official "Explanation" from the Skip barber TGM is: (base, mult, power) - heat transfer coefficients to internal gas cavity = base+(mult*(vel^power)), where vel is linear velocity of tire And the used Values are: (10,5,0.6)
Thank You Rock, and Chris. Without entering in a "deep" discussion about Linear Velocity and other "formulas", what is evident is the little difference in values between Internal and external values; the fact that first Factor in RF2 is always at maximum 10 ( and no more ) for dry tyres, while in Wet tyres may be a little bit less ( 9.5 or 9 ). Similarly, the "mult" factor ( the second ) commonly is 5 in dry tyres, but can be 4.5 in Wet tyres.
Copied from old posts, I guess it still works like this: For rolling heat rate (increase in speed): ('Realtime' section on your tgm file) .... DampingHeatEnergy=( , , ) >>> increase to obtain more rolling heat (sidewall ,carcass , tread) ... ExternalGasHeatTransfer=( , , ) >>> reduce to reduce heat loss to air ... GroundContactConductance=( , ) >>> reduce to reduce heat loss to ground Specific for sliding heating (friction in curves): DryTerrainEffect=( , ,X) /// third variable specifies the fraction of sliding power applied to the tyre as heat energy (1 means 100%) WetTerrainEffect=( , , 0.4) You can also replace specific heat and conductivity for every material on every tgm node. TreadMaterial=( , , , , , X, X) But this is more difficult to handle. You can reduce specific heat to increase heating rate when sliding, but possibly you also will increase cooling rate when tyre is not sliding. And layers interchange temperatures in complex ways so it is not easy to get what you want.
Raintyre, a big thank for these precisions, here is a lot of work to come for me with all this precious information ;-)
