Air Entrainment Parameters - MapleSim Help

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Air Entrainment Parameters

The Air Entrainment Params component is a record that holds air entrainment parameters. The record is used by rollers with a true Use air entrainment parameter.

	Description
	The Air Entrainment Params component stores the parameters that determine the effect of air entrainment on a roller.

Parameters

General

Name	Default	Units	Description	Modelica ID
$η$	$18.3 \cdot 10^{−6}$	$Pa s$	Dynamic viscosity of air	eta_air
$k_{fbc}$	$0.643$		Foil bearing constant	k_FoilBearingConstant

Roller

Name	Default	Units	Description	Modelica ID
$R_{q}$	$0.686 \cdot 10^{−6}$	$m$	Roller roughness, RMS	Rq_roller
$R_{a}$	$0.432 \cdot 10^{−6}$	$m$	Roller roughness, average	Ra_roller

Web

Name	Default	Units	Description	Modelica ID
$α$	$1.25 \cdot 10^{−6}$	$\frac{m^{3}}{s m^{2} Pa}$	Web air permeability	alpha_web
$R_{q}$	$3.38 \cdot 10^{−6}$	$m$	Web roughness, RMS	Rq_web
$R_{a}$	$2.67 \cdot 10^{−6}$	$m$	Web roughness, average	Ra_web

Web/Roller

Name	Default	Units	Description	Modelica ID
$μ_{s}$	$0.2$		Static coefficient friction	mu_s

See Also

Web Handling Library

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