Viscosity of Lubricant in Terms of Flow of Lubricant Calculator

✖Pressure difference between slot sides is the difference in pressure intensities at two different sides of the slot.ⓘ Pressure difference between slot sides [ΔP]			+10% -10%
✖Breadth of slot for oil flow is defined as the length of the rectangular slot in a plane perpendicular to the direction of flow.ⓘ Breadth of slot for oil flow [b]			+10% -10%
✖Oil film thickness is defined as the thickness of the oil film between the two parts in relative motion.ⓘ Oil film thickness [h]			+10% -10%
✖Length of slot in direction of flow is the length of the rectangular slot through which viscous oil flows.ⓘ Length of slot in direction of flow [l]			+10% -10%
✖Flow of lubricant from slot can be defined as the amount of lubricant flowing per unit time between the slots.ⓘ Flow of lubricant from slot [Q_slot]			+10% -10%

✖The Dynamic Viscosity of Lubricant is the resistance to movement of one layer of fluid over another.ⓘ Viscosity of Lubricant in Terms of Flow of Lubricant [μ_l]

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Viscosity of Lubricant in Terms of Flow of Lubricant Solution

STEP 0: Pre-Calculation Summary

Formula Used

Dynamic Viscosity of Lubricant = Pressure difference between slot sides*Breadth of slot for oil flow*(Oil film thickness^3)/(12*Length of slot in direction of flow*Flow of lubricant from slot)
μ_l = ΔP*b*(h^3)/(12*l*Q_slot)
This formula uses 6 Variables

Variables Used

Dynamic Viscosity of Lubricant - (Measured in Pascal Second) - The Dynamic Viscosity of Lubricant is the resistance to movement of one layer of fluid over another.
Pressure difference between slot sides - (Measured in Pascal) - Pressure difference between slot sides is the difference in pressure intensities at two different sides of the slot.
Breadth of slot for oil flow - (Measured in Meter) - Breadth of slot for oil flow is defined as the length of the rectangular slot in a plane perpendicular to the direction of flow.
Oil film thickness - (Measured in Meter) - Oil film thickness is defined as the thickness of the oil film between the two parts in relative motion.
Length of slot in direction of flow - (Measured in Meter) - Length of slot in direction of flow is the length of the rectangular slot through which viscous oil flows.
Flow of lubricant from slot - (Measured in Cubic Meter per Second) - Flow of lubricant from slot can be defined as the amount of lubricant flowing per unit time between the slots.

STEP 1: Convert Input(s) to Base Unit

Pressure difference between slot sides: 5.1 Megapascal --> 5100000 Pascal (Check conversion here)
Breadth of slot for oil flow: 49 Millimeter --> 0.049 Meter (Check conversion here)
Oil film thickness: 0.02 Millimeter --> 2E-05 Meter (Check conversion here)
Length of slot in direction of flow: 48 Millimeter --> 0.048 Meter (Check conversion here)
Flow of lubricant from slot: 15 Cubic Millimeter per Second --> 1.5E-08 Cubic Meter per Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

μ_l = ΔP*b*(h^3)/(12*l*Q_slot) --> 5100000*0.049*(2E-05^3)/(12*0.048*1.5E-08)

Evaluating ... ...

μ_l = 0.231388888888889

STEP 3: Convert Result to Output's Unit

0.231388888888889 Pascal Second -->231.388888888889 Centipoise (Check conversion here)

FINAL ANSWER

231.388888888889 ≈ 231.3889 Centipoise <-- Dynamic Viscosity of Lubricant

(Calculation completed in 00.004 seconds)

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Home » Engineering » Mechanical » Machine Design » Design of Sliding Contact Bearing » Viscosity and Density of Lubricant » Viscosity of Lubricant in Terms of Flow of Lubricant

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Created by Vaibhav Malani

National Institute of Technology (NIT), Tiruchirapalli

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Viscosity of Lubricant in Terms of Flow of Lubricant Formula

LaTeX Go

What is Sliding Contact Bearing?

The sliding contact bearings in which the sliding action is along the circumference of a circle or an arc of a circle and carrying radial loads are known as journal or sleeve bearings.

How to Calculate Viscosity of Lubricant in Terms of Flow of Lubricant?

Viscosity of Lubricant in Terms of Flow of Lubricant calculator uses Dynamic Viscosity of Lubricant = Pressure difference between slot sides*Breadth of slot for oil flow*(Oil film thickness^3)/(12*Length of slot in direction of flow*Flow of lubricant from slot) to calculate the Dynamic Viscosity of Lubricant, The Viscosity of Lubricant in Terms of Flow of Lubricant formula is defined as the ratio of the product of pressure difference, dimension b of the slot, and cube of fluid film thickness to the value of 12 times the product of the length of the slot and flow of lubricant. Dynamic Viscosity of Lubricant is denoted by μ_l symbol.

How to calculate Viscosity of Lubricant in Terms of Flow of Lubricant using this online calculator? To use this online calculator for Viscosity of Lubricant in Terms of Flow of Lubricant, enter Pressure difference between slot sides (ΔP), Breadth of slot for oil flow (b), Oil film thickness (h), Length of slot in direction of flow (l) & Flow of lubricant from slot (Q_slot) and hit the calculate button. Here is how the Viscosity of Lubricant in Terms of Flow of Lubricant calculation can be explained with given input values -> 231388.9 = 5100000*0.049*(2E-05^3)/(12*0.048*1.5E-08).

FAQ

What is Viscosity of Lubricant in Terms of Flow of Lubricant?

The Viscosity of Lubricant in Terms of Flow of Lubricant formula is defined as the ratio of the product of pressure difference, dimension b of the slot, and cube of fluid film thickness to the value of 12 times the product of the length of the slot and flow of lubricant and is represented as μ_l = ΔP*b*(h^3)/(12*l*Q_slot) or Dynamic Viscosity of Lubricant = Pressure difference between slot sides*Breadth of slot for oil flow*(Oil film thickness^3)/(12*Length of slot in direction of flow*Flow of lubricant from slot). Pressure difference between slot sides is the difference in pressure intensities at two different sides of the slot, Breadth of slot for oil flow is defined as the length of the rectangular slot in a plane perpendicular to the direction of flow, Oil film thickness is defined as the thickness of the oil film between the two parts in relative motion, Length of slot in direction of flow is the length of the rectangular slot through which viscous oil flows & Flow of lubricant from slot can be defined as the amount of lubricant flowing per unit time between the slots.

How to calculate Viscosity of Lubricant in Terms of Flow of Lubricant?

The Viscosity of Lubricant in Terms of Flow of Lubricant formula is defined as the ratio of the product of pressure difference, dimension b of the slot, and cube of fluid film thickness to the value of 12 times the product of the length of the slot and flow of lubricant is calculated using Dynamic Viscosity of Lubricant = Pressure difference between slot sides*Breadth of slot for oil flow*(Oil film thickness^3)/(12*Length of slot in direction of flow*Flow of lubricant from slot). To calculate Viscosity of Lubricant in Terms of Flow of Lubricant, you need Pressure difference between slot sides (ΔP), Breadth of slot for oil flow (b), Oil film thickness (h), Length of slot in direction of flow (l) & Flow of lubricant from slot (Q_slot). With our tool, you need to enter the respective value for Pressure difference between slot sides, Breadth of slot for oil flow, Oil film thickness, Length of slot in direction of flow & Flow of lubricant from slot and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Dynamic Viscosity of Lubricant?

In this formula, Dynamic Viscosity of Lubricant uses Pressure difference between slot sides, Breadth of slot for oil flow, Oil film thickness, Length of slot in direction of flow & Flow of lubricant from slot. We can use 3 other way(s) to calculate the same, which is/are as follows -

Dynamic Viscosity of Lubricant = Kinematic viscosity of lubricant oil*Density of Lubricating Oil
Dynamic Viscosity of Lubricant = 2*pi*Sommerfeld Number of Journal Bearing*Unit bearing pressure for bearing/(((Radius of Journal/Radial clearance for bearing)^2)*Journal Speed)
Dynamic Viscosity of Lubricant = Flow Coefficient*Load Acting on Sliding Bearing*(Oil film thickness^3)/(Total Projected Area of Bearing Pad*Flow of Lubricant across Bearing Pad)

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