Conjugate Heat Transfer in Thermal Inkjet Printheads
نویسندگان
چکیده
The mass of individual droplets ejected from a thermal inkjet printhead increases with increasing local temperature near the ejector nozzles. amount ink deposited on page and so printed image density depends droplet mass. Thus, nonuniformity results in variations that can be unacceptable to end users output. Such arise combination fluid flow heat transfer both solid components printhead. Conjugate (CHT) printheads is investigated here using validated numerical simulations. A typical considered for first time, cold drawn through structural by nozzle refill. effect width feedhole above chip field within analyzed. Validation simulation model required derivation novel analytical solutions relatively simple problems fully developed forced convection differentially heated planar channel conduction against plug flow. simulations these two are found compare well newly derived solutions. CHT over backward-facing step downstream wall was also simulated as part validation process, good agreement observed earlier studies. For main study, it reduces gradients surface chip, thus reducing temperature-related printing defects.
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ژورنال
عنوان ژورنال: Fluids
سال: 2023
ISSN: ['2311-5521']
DOI: https://doi.org/10.3390/fluids8030088