37170
In the above equations is the mass density ( current ) , is the material time derivative of , is the particle velocity , is the material time derivative of , is the Cauchy stress tensor , is the body force density , is the internal energy per unit mass , is the material time derivative of , is the heat flux vector , and is an energy source per unit mass .
 Cauchy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cauchy