Tub/Shower Head: Fluid dynamics question

In summary, the conversation discussed the installation of a shower head in a customer's bath tub. The customer was initially dissatisfied with the water flow, which led to the discovery of a small orifice diameter of 3/32". After enlarging the orifice to 3/16", the customer was satisfied with the increased water volume. The conversation also mentioned the importance of considering flow rate and municipal building codes when making changes to shower heads.
  • #1
ABI Builders
1
0
I installed a shower head in a customer's bath tub last week. The customer was not happy with the flow of water coming from the shower--so I removed the shower head and noted the orfice that leads to the spray area in the shower head was only 3/32" in diameter. I drilled a hole enlarging the orfice to 3/16". I reinstalled the shower head and the customer was happy with the new larger volume of water.

Water pressure is at 25psi and enters the shower head via a 1/2" steel pipe and then from the orfice fills a standard shower head to spray out.

How can I calculate the volume differences with changes in orfice size?

Thank you
Josh
 
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  • #2
The relevant quantity is flow rate: volume/time.

This scales quadratically along with the diameter of the hole, so doubling the diameter quadrupled the flow rate.
 
  • #3
Some municipal building codes require flow restrictors in replacement shower heads, just as they require low flush toilets. You should check the code so you don't unkowingly put your customer out of compliance. (They can always choose to do it anyway, once they're informed ;o)
 

1. How does the design of a tub/shower head affect fluid dynamics?

The design of a tub/shower head can significantly impact fluid dynamics. The shape, size, and number of nozzles on the head can affect the velocity, pressure, and distribution of the water flow. A more aerodynamic design can result in a more efficient use of water and a more comfortable shower experience.

2. What is the relationship between fluid flow and pressure in a tub/shower head?

The flow rate of water through a tub/shower head is directly related to the pressure of the water. As the pressure increases, the flow rate also increases. This is why adjusting the water pressure can change the intensity of the shower spray.

3. How does the material of a tub/shower head impact fluid dynamics?

The material of a tub/shower head can affect fluid dynamics in several ways. A smooth, non-porous material will result in a more laminar flow, while a rough or porous material can create turbulence and disrupt the flow. Additionally, the weight of the material can impact the overall pressure and flow rate of the water.

4. Can changing the angle of a tub/shower head affect fluid dynamics?

Yes, changing the angle of a tub/shower head can greatly impact fluid dynamics. Altering the angle can change the direction and velocity of the water flow, as well as the pressure and distribution of the water. This can also affect the perceived temperature of the water, as a more direct angle may feel hotter than a more dispersed angle.

5. How does the flow rate of a tub/shower head affect fluid dynamics?

The flow rate, or the amount of water that comes out of a tub/shower head per unit of time, can significantly affect fluid dynamics. A higher flow rate will result in a more forceful and concentrated spray, while a lower flow rate will create a softer and more widespread spray. The flow rate can also impact the overall water pressure and temperature of the shower.

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