Graduate Thesis Or Dissertation
 

Modeling the thermal inkjet firing process

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/4q77fv66s

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  • A numerical model has been developed to simulate the firing of an inkjet printhead. The model evaluates the heat generation and diffusion within the thin film structure, the phase change and vapor bubble growth in the ink, and the subsequent flow of ink from the orifice. The heat transfer is modeled numerically throughout the printhead's thin film structure and ink through an asymptotic integration algorithm. The bubble growth and fluid flow are coupled and modeled through conservation of momentum, conservation of energy, and state equations. The heat transfer model has been validated with simple theoretical solutions and ink drop weight and velocity have been compared to empirical data. To test the usefulness of the model as a design tool, parametric studies have been made which characterize pen performance as a function of several system parameters. The results show that although the model does not reflect every detail in the firing process, it is useful for predicting trends and investigating new design concepts.
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  • File scanned at 300 ppi (Monochrome, 256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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