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The framework combines a powder packing model based on Discrete Element Method and a 3-D transient heat and fluid flow simulation .
 concept or principle: framework; material: powder; concept or principle: model; concept or principle: Discrete Element Method; concept or principle: 3-D; concept or principle: heat; machanical property: fluid flow
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: framework, powder, model, Discrete Element Method, 3-D, heat, fluid flow 
Answer:
 concept or principle: framework; material: powder; concept or principle: model; concept or principle: Discrete Element Method; concept or principle: 3-D; concept or principle: heat; machanical property: fluid flow