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Combined with experimental analysis , the results presented herein indicate that active fluid convection at the solidification front increase the probability of new grain formation , which suppresses the epitaxial growth of columnar grains .
 experimental, fluid, solidification, probability, grain, epitaxial, columnar grains
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:
 experimental, fluid, solidification, probability, grain, epitaxial, columnar grains