When calculating a Zenz diagram, the Reynold number changes from a high value at high velocities to a low value at low velocities.
In the laminar flow, the number of particle collisions reduces, whereby the material pressure drop reduces also.
When the Reynold number is decreasing below 2*105 the air flow is becoming from turbulent to laminar over a range from Re=2*105 to Re=0.35*105.
The consequence is that, at the same capacity, the total pressure drop also decreases.
The discontinuity in the turbulence/laminar range is therefore noticed in the Zenz diagram.
Between the airflows from calculation 13 to 19 in the attached diagram, the airflow changes from turbulent to laminar, causing the Zenz curve to drop again.
Turbulent/laminar transition influence on Zenz diagram.
When calculating a Zenz diagram, the Reynold number changes from a high value at high velocities to a low value at low velocities.
In the laminar flow, the number of particle collisions reduces, whereby the material pressure drop reduces also.
When the Reynold number is decreasing below 2*105 the air flow is becoming from turbulent to laminar over a range from Re=2*105 to Re=0.35*105.
The consequence is that, at the same capacity, the total pressure drop also decreases.
The discontinuity in the turbulence/laminar range is therefore noticed in the Zenz diagram.
Between the airflows from calculation 13 to 19 in the attached diagram, the airflow changes from turbulent to laminar, causing the Zenz curve to drop again.
Attachments
zenzdiagramdesediluteconveying (PNG)
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