Heat Analysis of a Vacuum Flask

Materials with low thermal conductivity like aerogel, acrylic, aluminum silicate, superfine glass wool, and phenolic foam are often used as insulation materials in engineering have noticed increasing applications other spheres of life, buildings vacuum flasks. The objective this research is to study the temperature variation coffee over 10 hours a selected flask while varying geometrical material properties flask. In words, change parameters (without changing fluid capacity) minimize heat loss time. range bottleneck radius from 40 mm 60 mm, step size (increment) 5 mm. width whole proportional radius, constant capacity. initial design an outer inner steel layer plastic between, made nylon 50 This allows hot be at 55 oC after atmospheric conditions. layers aerogel was 72.3 hours, CO2 were 67.9 acrylic 77.89 10-hour duration still air. simulation carried out using COMSOL, result shows that best combination. Verification validation test for convergence numerical analytical solutions.