dooubt

- December 22, 2019 at 5:01 pm
  
  shraypandey18
  Subscriber
  
  i was seeing the lecture on temperature contours in 'hands on experience to engineering simulations' and in that the professor seleted the temperature and clicked on evaluate all results and calculated nodal values saying that inverting matrix will take time but doesn't the inverting matrix find the nodal values of element?
- December 22, 2019 at 7:41 pm
  
  peteroznewman
  Subscriber
  
  Meshing creates a large number of nodes with unknown temperatures. When the BC are applied, the matrix can be formed and the unknown temperatures solved for by matrix inversion or other mathematical methods, which can take time for a large number of nodes, but that only creates a table of temperature values at the nodes.
  
  When you plot a contour of temperature over the area of the element, there is a small, fast, calculation to take the nodal temperatures and map them through the area of the element. That is what is done when Evaluate All Results is selected after requesting a new plot.