Abstract
Mathematical modeling of unit operations especially in biomaterials processing plays an important part in understanding simultaneous heat and mass transfer and fluid flow phenomena. Hydrothermal/supercritical processes are one such process which utilizes high temperature and pressure to synthesize materials for varied applications. The present study constitutes development of a model incorporating all standard transport equations and transient conditions to predict the behavior of process and thus materials upon heating to high temperature in an enclosed composite (Steel and Teflon (PFA) vessel. Commercial software package SOLIDWORKS® is employed to simulate and output is presented as animations after post-processing. Results yield very useful data and information about process; materials of construction and materials being processed which helps in optimization.
Highlights
Hydrothermal treatment [1] is a thermochemical process [2], widely used in various manufacturing processes [3] [4] [5]
The heat generation (Q) in joules is in accordance with the Joule heating law (Q = I2Rt), where I is the current in amperes, R is the resistance of the heating elements and t is the duration in seconds
Results are presented in animation form yielded by simulation software package to explain and co-relate the phenomena occurring during heat transfer
Summary
Hydrothermal treatment [1] is a thermochemical process [2], widely used in various manufacturing processes [3] [4] [5]. Precise calculation of the heat generation and transfer can give more control over the hydrothermal process. Any hydrothermal process involves two steps i.e. heat generation and heat transfer. Heat generation may be attained via electrical power [9] [10]. External heating elements are placed for more precise control of temperature during the hydrothermal treatment. Heating elements may be constructed through high electrical resistance materials (stainless steels, tungsten alloys & nickel chromium alloys)
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