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The second part deals with the influence of porosity and pore sizes on thermal and fluid properties , i.e. , the effective thermal conductivity ( ETC ) and wettability .
 porosity, pore sizes, fluid properties, effective thermal conductivity, wettability
Please list all entity words in the text that fit the category. Output format is "word1, 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} 
Answer:
 porosity, pore sizes, fluid properties, effective thermal conductivity, wettability