Simulation Analysis of the Influence of Nozzle Structure Parameters on Material Controllability
Abstract
:1. Introduction
2. Structural Analysis
3. Simulation Analysis
4. Results
5. Discussion
- (1)
- A novel flow-focusing nozzle with encapsulation function has been developed. ANSYS-FLUENT software has been used to optimize the 3D bioprinting nozzle. The results show that changing the nozzle structure parameters can effectively control the diameter of material P, which further improves the encapsulation demand of 3D bioprinting nozzle, realizes the controllability of the material P, and improves the interchangeability of the nozzle.
- (2)
- Through theoretical research and numerical simulation analysis, the controllable mechanism of material printing is studied under the pressure range 0–1 MPa. The experimental results show that the diameter of inner cavity biomaterial will decrease with the increase of the pressure in the outer cavity, and the shear force of outer fluid to the inner fluid will increase, resulting in the increase of the stress on the material P.
- (3)
- Through the orthogonal test and analysis of the novel nozzle structure, it is determined that the main factors affecting the extrusion molding of the nozzle material include the inner cavity diameter D1, the outer cavity diameter D2 and lead length L. Based on the results of orthogonal test analysis, it is shown that the primary and secondary order of influencing factors on the molding effect is lead length L > inner cavity diameter D1 > outer cavity diameter D2. The extrusion diameter of material P can be better controlled by controlling the lead length and the inner cavity diameter.
Author Contributions
Funding
Conflicts of Interest
References
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Factor | Horizontal | ||
---|---|---|---|
1 | 2 | 3 | |
Inner diameter D1 (mm) | 0.26 | 0.33 | 0.41 |
Outer diameter D2 (mm) | 0.7 | 0.84 | 1.25 |
Lead length L (mm) | 0 | 2.5 | 5 |
Orthogonal Test | A | B | C | R1 (Um) |
---|---|---|---|---|
1 | 0.33 | 1.25 | 5 | 86 |
2 | 0.33 | 0.84 | 2.5 | 110 |
3 | 0.41 | 1.25 | 2.5 | 95 |
4 | 0.33 | 0.84 | 2.5 | 110 |
5 | 0.26 | 0.84 | 0 | 260 |
6 | 0.33 | 0.7 | 0 | 330 |
7 | 0.41 | 0.84 | 5 | 200 |
8 | 0.33 | 1.25 | 0 | 330 |
9 | 0.33 | 0.84 | 2.5 | 110 |
10 | 0.26 | 1.25 | 2.5 | 55 |
11 | 0.41 | 0.84 | 0 | 410 |
12 | 0.33 | 0.84 | 2.5 | 110 |
13 | 0.26 | 0.7 | 2.5 | 103 |
14 | 0.41 | 0.7 | 2.5 | -- |
15 | 0.33 | 0.7 | 5 | 205 |
16 | 0.26 | 0.84 | 5 | 80 |
17 | 0.33 | 0.84 | 2.5 | 110 |
Experiment Results | A | B | C |
---|---|---|---|
K1 | 498 | 638 | 1330 |
K2 | 1501 | 1500 | 803 |
K3 | 705 | 566 | 571 |
K1(av) | 129.5 | 212.67 | 332.5 |
K2(av) | 166.78 | 166.67 | 100.375 |
K3(av) | 235 | 141.5 | 142.75 |
Range R | 105.5 | 71.17 | 232.125 |
Major factor→Minor factor | C→A→B |
Variance Analysis | Variance Source | Freedom | Square Sum | Mean Square | F Value | p Value | Significance |
---|---|---|---|---|---|---|---|
1 | A | 1 | 21.82 | 21.82 | 25.11 | 0.0002 | significant |
2 | B | 1 | 14.6 | 14.6 | 16.81 | 0.0008 | significant |
3 | C | 1 | 88.94 | 88.94 | 102.36 | <0.0001 | Extremely significant |
4 | AB | 1 | 1.22 | 1.22 | 1.41 | 0.0203 | significant |
5 | AC | 1 | 0.24 | 0.24 | 0.28 | 0.3392 | non-significant |
6 | BC | 1 | 5.34 | 5.34 | 6.15 | 0.0133 | significant |
7 | A2 | 1 | 0.076 | 0.076 | 0.088 | 0.7577 | non-significant |
8 | B2 | 1 | 2.1 | 2.1 | 2.42 | 0.0340 | significant |
9 | C2 | 1 | 71.77 | 71.77 | 82.6 | <0.0001 | Extremely significant |
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Liu, H.; Zheng, G.; Cheng, X.; Yang, X.; Zhao, G. Simulation Analysis of the Influence of Nozzle Structure Parameters on Material Controllability. Micromachines 2020, 11, 826. https://doi.org/10.3390/mi11090826
Liu H, Zheng G, Cheng X, Yang X, Zhao G. Simulation Analysis of the Influence of Nozzle Structure Parameters on Material Controllability. Micromachines. 2020; 11(9):826. https://doi.org/10.3390/mi11090826
Chicago/Turabian StyleLiu, Huanbao, Guangming Zheng, Xiang Cheng, Xianhai Yang, and Guangxi Zhao. 2020. "Simulation Analysis of the Influence of Nozzle Structure Parameters on Material Controllability" Micromachines 11, no. 9: 826. https://doi.org/10.3390/mi11090826