Timeline for What is the force needed to exert on the piston for a certain extrusion rate of a syringe tube?
Current License: CC BY-SA 4.0
22 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 2 at 19:01 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jun 4 at 18:07 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Feb 5 at 17:00 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Oct 8, 2023 at 17:00 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jun 10, 2023 at 15:04 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Feb 10, 2023 at 14:02 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Oct 13, 2022 at 13:03 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jun 15, 2022 at 12:03 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Feb 15, 2022 at 13:49 | comment | added | Pete W | The syringe force is pretty much a combination of two things. (1) friction at the sides (for a large syringe with a high back pressure, sometimes a minor component). (2) pressure times plunger area (ie syringe internal space cross section). The pressure in turn is proportional to fluid viscosity, via Poiseuille's law | |
| Feb 15, 2022 at 12:03 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Oct 18, 2021 at 12:57 | comment | added | Abel | pressure you are injecting into, syringe geometry, viscosities of fluids in syringe ( likely includes both liquid and gas)... possible reactions occurring in syringe?... if you eliminate all the funny stuff for ballpark worst case, model syringe as two cylinders, a pressure at the output, and a constant force from plunger friction... and throw a factor of safety of 4 on it for just the syringe. more if other linkages, etc could also potentially misalign. | |
| Oct 18, 2021 at 11:08 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jun 20, 2021 at 11:05 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Feb 20, 2021 at 10:03 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Oct 25, 2020 at 22:48 | comment | added | user28774 | The early sections of Faber (1995, Fluid dynamics for physicists, Cambridge University Press) use a syringe as an extended case study to survey the field of fluid mechanics. That's good news and bad news. It's good news in that there's an easy-to-get source where you can read up on the issue. It's bad news in that it indicates that almost any fluid-mechanical phenomenon could be going on in a syringe, so in order to get a straight answer to your question, you're going to have to specify a lot more detail about the geometry of the syringe, the fluid to be used, and the extrusion rate. | |
| Oct 23, 2020 at 9:06 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jun 25, 2020 at 8:04 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| May 31, 2020 at 0:02 | comment | added | Rhodie | F=ma to calculate force. Pressure in a fluid is different. | |
| May 26, 2020 at 7:36 | answer | added | loStraniero | timeline score: 0 | |
| May 25, 2020 at 22:05 | comment | added | Transistor | I'd start by trying to get a quantitative feel for the force required. Get some syringes from the nearest pharmacy, fill them with various fluids - maybe Golden Syrup (a viscous sugar syrup), etc., invert the syringe on a kitchen scales and press down on the body. Measure the force (N = kg x 9.81) and the time taken (from which you can calculate the rate). That may help you determine if you've got gross errors when you start to do the calculations. | |
| May 25, 2020 at 21:19 | review | First posts | |||
| May 26, 2020 at 3:26 | |||||
| May 25, 2020 at 21:13 | history | asked | Galina | CC BY-SA 4.0 |