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Table 1 Characteristics of liquid flow in tubules at night

From: Can Randall’s plug composed of calcium oxalate form via the free particle mechanism?

  

Ascending Henle loop

Distal tubule

Collecting duct

Volume

V (m3)

5.07 × 10−12

2.29 × 10−12

5.94 × 10−11

Average radius

r (m)

1.16 × 10−5

1.10 × 10−5

2.65 × 10−4

Volumetric flow

Q (m3 s−1)

3.98 × 10−14

3.98 × 10−14

1.63 × 10–11#

Average linear velocity

uav (m s−1)

9.42 × 10−5

1.05 × 10−4

3.24 × 10–3#

Average transit time of liquid

ttr (s)

127

57

0.8 (3.6*)

Reynolds number

Re (−)

3.2 × 10−3

3.3 × 10−3

2.1 (0.31#)

  1. Value denoted by asterisk is the transit time if volumetric flow in the CD is equal to the flow rate at the opening, # value at the opening of the CD