Effects of mass transfer coefficient on pore shape in solid

摘要: Abstract The shape of a pore resulting from nucleated bubble entrapped by solidification front for different mass transfer coefficients is predicted in this work. Mass coefficient associated with reference concentrations used to determine characteristics solute rate across the cap or responsible solid. Pore formation and its solid influence contemporary issues biology, engineering, foods, geophysics climate change, etc. This work extends previous models, accounting momentum transport self-consistently determined whose surface satisfied physico-chemical equilibrium beyond front, study mechanisms formation. Mechanism can be Case 1, which subject an emerged through concentration boundary layer on into surrounding liquid early stage. Cases 2a 2b are referred opposite directions submerged layer. In contrast former, latter exhibits stronger effects volume expansion gas pressure than transport. results show that increase decreases radius time entrapment 1. An isolated cannot found 2b, since at increases rapidly late stage, respectively. agrees experimental data. control shape, strongly depends magnitudes