Where Can I Find Information on Drag Coefficients for Slow Speed Mixers?

  • Thread starter Thread starter B12se-R
  • Start date Start date
  • Tags Tags
    Coefficients Drag
AI Thread Summary
Information on drag coefficients for slow-speed mixers is scarce, particularly for fluids with high viscosity, such as the 100,000 poise fluid mentioned. The discussion emphasizes the need to go beyond Stokes Law to accurately calculate drag forces on rotating mixer blades. The specific parameters include a low Reynolds number and a cross-sectional footprint of 3" x 1/3" for the mixer tines. It is suggested that mixer manufacturers should provide essential design data to aid in these calculations. Overall, the search for reliable resources on this topic remains challenging.
B12se-R
Messages
2
Reaction score
0
I'm kind of stuck in my search, hoped to be able to find some answers on this board.

Anyways, I've been taksed to design a slow speed mixer and I'm trying to look up information beyond Stokes Law of FD = 6 pi r V u

The fluid to be mixed is approx. 100000 poise, incompressible fluid. I'm trying to find how to approximate a proper drag coefficient and calculate a drag force on a rotating mixer blade. Cross sectional footprint of one tine passing through the fluid is approx. 3" x 1/3". Low speed, so Re << 1. density is 1.3 g/cm3

Can someone throw me a bone please?
 
Engineering news on Phys.org
B12se-R said:
I'm kind of stuck in my search, hoped to be able to find some answers on this board.

Anyways, I've been taksed to design a slow speed mixer and I'm trying to look up information beyond Stokes Law of FD = 6 pi r V u

The fluid to be mixed is approx. 100000 poise, incompressible fluid. I'm trying to find how to approximate a proper drag coefficient and calculate a drag force on a rotating mixer blade. Cross sectional footprint of one tine passing through the fluid is approx. 3" x 1/3". Low speed, so Re << 1. density is 1.3 g/cm3

Can someone throw me a bone please?
The mixer manufacturer should supply such fundamental design information on how to use their product.
 
Posted June 2024 - 15 years after starting this class. I have learned a whole lot. To get to the short course on making your stock car, late model, hobby stock E-mod handle, look at the index below. Read all posts on Roll Center, Jacking effect and Why does car drive straight to the wall when I gas it? Also read You really have two race cars. This will cover 90% of problems you have. Simply put, the car pushes going in and is loose coming out. You do not have enuff downforce on the right...
Thread 'Physics of Stretch: What pressure does a band apply on a cylinder?'
Scenario 1 (figure 1) A continuous loop of elastic material is stretched around two metal bars. The top bar is attached to a load cell that reads force. The lower bar can be moved downwards to stretch the elastic material. The lower bar is moved downwards until the two bars are 1190mm apart, stretching the elastic material. The bars are 5mm thick, so the total internal loop length is 1200mm (1190mm + 5mm + 5mm). At this level of stretch, the load cell reads 45N tensile force. Key numbers...
I'm trying to decide what size and type of galvanized steel I need for 2 cantilever extensions. The cantilever is 5 ft. The space between the two cantilever arms is a 17 ft Gap the center 7 ft of the 17 ft Gap we'll need to Bear approximately 17,000 lb spread evenly from the front of the cantilever to the back of the cantilever over 5 ft. I will put support beams across these cantilever arms to support the load evenly
Back
Top