Viscosity – Apple Juice

Apple Juice

Apple Juice Full Image

USE
Apple juice is consumed as a beverage.

TEST EQUIPMENT
Instrument:
• Viscometer or Rheometer
• Spring Torque Range: LV
• Spindle: YULA-15E

Accessories:
• Enhanced UL Adapter (ULA-EY),
• TC-650SD Programmable Refrigerated Bath
• Speed: 50, 75 and 100 rpm

TEST METHOD
The Enhanced UL Adapter may be used with various Brookfield Viscometers or Rheometers.  In our example, we used a Brookfield DV3TLV, with RheocalcT software for automated instrument control and data acquisition.  Our test temperatures of 4°C and 25°C were maintained by direct immersion of the Enhanced UL Adapter sample chamber into a TC-650SD Programmable Refrigerated Bath.  Representative data from the analyses are shown in Figure 1.

Apple Juice Graph
Figure 1

Figure 1 graph shows relatively constant viscosities at 4°C (Blue Data: 2.5cP) and 25°C (Red Data: 1.4cP) over the speed range tested.  This type of flow behavior is referred to as “Newtonian”.  The graph also shows that the apple juice viscosity is higher at 4°C, than at 25°C.  Increasing temperature typically decreases the viscosity of a given substance.