Nozzles on the drill do not heat up

- July 13, 2024 at 4:58 pm
  
  javat33489
  Subscriber
  
  Hi all. I made calculations for drilling rock.
  Everything went well. I provided the temperature data:
  After the calculation, the studied nozzles on the drill heated up by only 0.2 K, why did this happen?
  Friction in contacts between nozzles and rock coefficient = 0.2.
- July 20, 2024 at 5:19 pm
  
  javat33489
  Subscriber
  
  I tried to increase the coefficient of friction to 0.6 (steel-concrete), but the temperature rose to only 305K.
  Help Please.
- July 23, 2024 at 11:12 am
  
  Ashish Khemka
  Forum Moderator
  
  Hi,
  Please check if the problem#4 is of use to you: Microsoft Word - thermal.doc (dynaexamples.com)
  Regards,
  Ashish Khemka
  - July 29, 2024 at 4:43 pm
    
    javat33489
    Subscriber
    
    Sir, this file won't help me. There are no answers to such questions.
    I did a thermal analysis where I drilled a die from SPG and SPH but the result is the same, the teeth on the drill that I'm examining do not heat up more than 1K.
    The initial temperature is set to 295K, as a result of a small drilling I see the teeth heating up to 295.2K.
    When drilling an SPG die, neither the teeth nor the die itself heat up. When drilling an SPH, the teeth do not heat up, but the SPH die heats up like crazy.
    Friction coefficients = 0.5.
    SPG:
    SPH:
    Analysis settings again:
    During the calculation I also receive such warnings. Could this be related?
    
    P/S. For SPH, I considered the same model as SPG, I only replaced SECTION with SPH.