Enter Water Temperature:

°F °C

Enter Ethylene Glycol Percentage:

Use of Ethylene Glycol not recommended above 150°F/65°C. Refer to User Guidelines for details.

Warning: This combination of temperature and Ethylene-Glycol concentration is subject to freezing at standard atmospheric pressure.

Warning: This combination of temperature and Ethylene-Glycol concentration is subject to boiling at standard atmospheric pressure.

Warning: This combination of temperature and Ethylene-Glycol concentration results in an out-of-bounds error.

At coolant temperatures of 212°F/100°C up to 30% Ethylene Glycol concentration the solution is subject to boiling at standard atmospheric pressure.

Invalid Selection

Select Cross Section:

Diameter:

inches mm

Inner Diameter:

inches mm

Outer Diameter:

inches mm

Height:

inches mm

Width:

inches mm

Radius:

inches mm

Nominal Plug Size:

Drill Size:

inches mm

Baffle Thickness:

inches mm

Click here for NPT tap drill chart.here for BSP tap drill chart.

Coolant Flow Rate:

GPMLPM

Enter Reynolds Number:


Cross Sectional Area: N/A sq. inches sq. mm

Wetted Perimeter: N/A inches mm

Hydraulic Diameter: N/A inches mm

Steel Temperature vs. Coolant Flow
Turbulent Flow Rate Calculator

Turbulent Flow Rate Calculator

The Smartflow Reynolds Number Calculator is provided as a service to the injection molding community as an easy-to-use online resource. In the development of our calculator special attention was focused on calculating values at elevated water temperatures. This function is very useful to our industry given the rapidly growing use of pressurized mold temperature controllers, operating at temperatures up to 350°C (662°F).


Turbulent Flow Basics

turbulent flowIn a mold cooling system Turbulent water flow is much more efficient at removing heat than laminar flow. After turbulent flow is achieved, increasing the flow rate further yields more cooling benefit, but at a declining rate compared to water flow rate. The graph of "Steel Temperature vs. Coolant Flow" illustrates this point.

Often mold operators try to maximize the flow of water through their cooling systems to ensure turbulent flow. This practice increases water pumping cost and can also limit the amount of cooling water available for cooling other molds on the same cooling system circuit. A better practice is to ensure turbulent flow and sufficient cooling by using flow meters and FCI (Fluid Characteristic Indication) Technology. In this way an efficient cooling process can be realized using the minimum pumping capacity and energy.