Aspect Imaging Online MRI-based Rheometer (FlowScan ) 29 August - - PowerPoint PPT Presentation

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Aspect Imaging Online MRI-based Rheometer (FlowScan ) 29 August - - PowerPoint PPT Presentation

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Aspect Imaging Online MRI-based Rheometer (FlowScan ) 29 August 2018 Based on principles of capillary viscometry Assumptions: flow is laminar flow is steady state fluid properties are constant no slip at walls axial

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SLIDE 1

Aspect Imaging Online MRI-based Rheometer (FlowScan™)

29 August 2018

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SLIDE 2

Based on principles of capillary viscometry

  • Assumptions:

▪ flow is laminar ▪ flow is steady state ▪ fluid properties are constant ▪ no slip at walls ▪ axial velocity component only

  • 10.0
  • 8.0
  • 6.0
  • 4.0
  • 2.0

0.0 2.0 4.0 6.0 8.0 10.0 0.5 1 radial position (mm) velocity (m/s)

FlowScan velocity image

Rheogram

1 10 100 1 10 100 1000 shear stress (Pa) shear rate (1/s)

FLOWSCAN

Velocity profile

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SLIDE 3

FlowScanTM System

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SLIDE 4

dr dV r

z

 ) (  

r L P r 2 ) ( ) (    

  

+

VISCOSITY SHEAR RATE SHEAR STRESS Zero shear rate

L

r z Maximum shear rate

Velocity profile Pressure difference

Viscosity as a function of shear rate

Velocity

Radial distance

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SLIDE 5

rheogram

1 10 100 1 10 100 1000 shear stress (Pa) shear rate (1/s)

FLOWSCAN ROTATIONAL

Real-Time Rheology of Personal Care Products: Liquid Hand Soap

FlowScan-derived velocity image

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SLIDE 6

0.001 0.01 0.1 1 10 100 0.1 1 10 100 1000 Viscosity (Pa.s) Shear Stress (Pa)

Dishwasher Gel MRI Liquid hand soap MRI Laundry Detergent MRI Carbopol 0.1% MRI Xanthan 0.2 % MRI Dishwasher Gel Offline Liquid hand soap Offline Laundry Detergent Offline Carbopol 0.1% Offline Xanthan 0.2 % Offline

Overview of Rheological Properties of Personal Care Products:

Online FlowScan (MRI) data vs. offline rheometer

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SLIDE 7

7

The capability of “seeing” the flow

  • Wall slip (6,7)
  • Settling particles (3,4,5)
  • Yield stress (6,7)
  • Turbulence(2)

Tozzi et al. Acta mechanica, 224 (10) (2013)

Early detection of changes in flow conditions

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SLIDE 8

Challenges in processing non-Newtonian materials

  • Need to fine-tune quality in real-time
  • Finding optimum of product

performance vs. cost

  • Need to maximize throughput
  • Automation of measurement and the

production process

  • A shift towards larger batch sizes
  • Need for early detection of defects
  • Minimize wastage and product rejects
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SLIDE 9

Rheograms in quality and process control: Measurement of product performance

Two methods of rheological measurement:

  • 1. OFFLINE MEASUREMENT/ TEST

(via conventional rotational rheometer)

  • Versatile (many tests possible)
  • Slow, laborious
  • Sample handling issues
  • Moving parts require maintenance
  • Issues with particulates
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SLIDE 10

Rheograms in quality and process control

2 methods of rheological measurement:

  • 1. OFFLINE MEASUREMENT/ TESTS (via conventional

rotational rheometer instrumentation)

  • Versatile (many tests possible)
  • Slow, laborious
  • Sample handling issues
  • Moving parts require maintenance
  • Issues with particulates
  • 2. REAL-TIME, IN-LINE RHEOLOGY

(via MRI or Magnetic Resonance Imaging)

  • Measures flow curves plus other properties not

detected by conventional instruments

  • Fast (real-time)
  • Automated, non-invasive, maintenance-free
  • Avoids issues of particulates (gap-effect and settling)
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SLIDE 11

FlowScan

™

Real-time non-intrusive liquid measurement platform : Rheology applied to oil-based drilling muds

M i c h a e l M c C a r t h y

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SLIDE 12

Inline MRI Rheometry

FlowScan™: Real Time Drilling Fluids Rheology Data is Important

  • Rheology Data
  • Real Time Hydraulics Modeling
  • Plastic Viscosity & Yield Point Determination
  • Hole Cleaning Efficiency
  • Dilution Economics
  • Annular Flow Dynamics
  • Pressure Loss Calculations
  • Surge & Swab Calculations

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SLIDE 13

Inline MRI Rheometry

Challenges for Measurement of Drilling Muds

  • Fluid is extremely challenging
  • Multiphase, multicomponent,
  • paque fluid
  • Often with large suspended solids
  • Available instruments are not adequate
  • Utilize small gaps that plug regularly
  • Require an operator, can be slow
  • Off-line techniques measure only

small amounts of mud and can easily lead to sampling errors

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SLIDE 14

Inline MRI Rheometry

How does FlowScan™ Overcome these Challenges?

  • No obstructions to flow

the entire pipe cross section is open

  • Many gallons of material analyzed for each flow curve

 minimize sampling errors, high data integrity

  • Measurement is automated and runs continuously

 Updated about every 5 minutes

  • Multi-parameter measurements from a single instrument

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SLIDE 15

Newtonian Fluid Results

500 1000 1500 20 40 60 80 100 120 140 160 180 Shear rate (1/s) Shear Stress (Pa) Glycerol 35C

6.4 [Liter/min] 14.3 22.1 28.3 Circles are data from rotational rheometry Anton Paar AR-100
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SLIDE 16

Non-Newtonian Fluid : Carbopol

200 400 600 800 1000 1200 10 20 30 40 50 Shear rate [1/s] Shear stress [Pa] 0.2% Carbopol @ PH=7

2.9 [Liter/min] 5.9 8.9 10.4 14.85

Circles are data from off-line rotational rheometer

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SLIDE 17

Drilling Mud

100 200 300 400 500 600 700 800 900 1000 1100 2 4 6 8 10 12 14 16 18 20

shear rate [1/s] shear stress [Pa]

1.9 [Liter/min] 2.9 5 7.4 8.8 11.7 FANN 35 FANN 35 after 10 min rest FANN 35 after 30 min rest
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SLIDE 18

MRI Advantages (traditional rheometer cannot achieve the following)

  • Directly measures flow field no assumptions

required

  • Speed of data acquisition
  • Same instrument from laboratory to process

line

  • Capable of additional measurements

including

▪ Composition ▪ Droplet size distribution ▪ Uniformity (degree of mixing)

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SLIDE 19

Contact Michael McCarthy or Andrew Lonergan for more information:

mmccarthy@aspectimaging.com M: +1 530 219 9941 alonergan@aspectimaging.com M: +44 7432 189533

Thank You

www.aspect-ai.com