Chinese researchers experiment with new pumps for flow delivery systems, 3D printing prototypes. Their study is detailed in full in the recently published ‘Improved design and experimental analysis of valveless piezoelectric pump based on hemisphere-segment bluff-body.’
Piezoelectric devices are often connected with 3D printing today, from creating new materials to testing new techniques in bioprinting, to fabrication of sensors; however, in this study, the authors create a model for a valveless pump that can deliver fluids based on the inverse effects of a piezoelectric vibrator.
Previous studies have resulted in valveless designs, but in this work, the scientists sought to improve performance in flow further, by modifying the splitting angle of the hemisphere-segment bluff-body (HSBB). 3D printed prototypes allowed the researchers to test the pumps and analyze computational fluid dynamics, with the working process being split into four phases:
- The absorbing process – as the vibrator moves up, increasing chamber volume, the left pipe absorbs added fluid volume.
- The vibrator moves down, and the chamber volume decreases.
- The right pipe drains more fluid volume than the left.
- The ‘reciprocating vibration’ results in unidirectional fluid delivery in the chamber.
“In the process of reciprocating motion of vibrator, the equation of paraboloid surface is utilized to simulate the deformation of vibrator for convenient calculation since the deformation surface of first order vibration is similar to paraboloid of revolution,” explain the researchers.
“Supposing the initial state of piezoelectric vibrator is at horizontal position when t = 0 and starts to move upward. The vibration amplitude at each point for piezoelectric vibrator keeps invariant.”
Performance of flow ultimately relies on the difference between positive and negative directions in flow resistance.
“The bluff-body resistances in the flow field include fiction and shape resistance. The shape resistance plays a dominant role in piezoelectric pump due to common laminar flow state in the chamber,” state the researchers.
Simulation models were built, and the research team calculated flow velocity and pressure.
“For all pumps with HSBB of different splitting angles, the vortex of positive flows between HSBB are larger than that of negative flows, and the velocity of positive flows on the outlet are obviously greater than that of negative flows on the outlet. Moreover, the velocity difference between positive flows and negative flows on the outlet firstly increases and then decreases, suggesting that the proper enlargement of splitting angle can facilitate the unidirectional flow. Besides, for all pumps with HSBB of different splitting angles, the pressure difference between the inlet and outlet of positive flows are less than that of negative flows,” explained the authors.
“The simulation and experiment results on the flow resistance of different pumps suggest that the valveless piezoelectric pump with HSBB of 210° splitting angle exhibits the best flow transportation performance, which is a promising candidate for various flow delivery applications.”
What do you think of this news? Let us know your thoughts! Join the discussion of this and other 3D printing topics at 3DPrintBoard.com.[Source / Images: ‘Improved design and experimental analysis of valveless piezoelectric pump based on hemisphere-segment bluff-body’]
Subscribe to Our Email Newsletter
Stay up-to-date on all the latest news from the 3D printing industry and receive information and offers from third party vendors.
You May Also Like
3D Printing Webinar and Event Roundup: December 3, 2023
We’ve got plenty of events and webinars coming up for you this week! Quickparts is having a Manufacturing Roadshow, America Makes is holding a Member Town Hall, Stratafest makes two...
Ricoh Partners with Materialise to Enhance 3D Printing in Hospitals
Ricoh (TYO: 7752) announced a partnership with Materialise (Nasdaq: MTLS) at the Radiological Society of North America (RSNA) 2023 event. This collaboration aims to make 3D printing more accessible and...
World’s First Whole-Eye Transplant Enabled with Materialise 3D Printing Tech
In an extraordinary medical achievement, Materialise (Nasdaq: MTLS) has played a crucial role in the world’s first successful whole-eye transplant, including a partial face transplant from a single donor. A...
Ricoh’s Vision for Medical 3D Printing: An Interview with Managing Director Gary Turner
In the last decade, 3D printing has steadily carved its niche within the medical sector. Incorporating the technology is a testament to the ever-evolving nexus of technology and healthcare. As...
Upload your 3D Models and get them printed quickly and efficiently.