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PowerPoint Presentation:

Experiment 3. Liquid Viscosity Nina Clavio Argela Olbes

PowerPoint Presentation:

INTRODUCTION

Viscosity:

Viscosity - Migration of linear momentum along a velocity gradient. - Fluid’s resistance to flow

Viscosity:

Viscosity 2 types: dynamic/ absolute kinematic

Dynamic or Absolute:

Dynamic or Absolute Measure of internal resistance Tangential force per unit area required to move one horizontal plane with respect to another at a velocity maintained at a distance

Dynamic or Absolute:

Dynamic or Absolute

Dynamic or Absolute:

Dynamic or Absolute Τ = ɳ dc/ dy where: Τ = shearing stress ɳ = dynamic coefficient

Kinematic:

Kinematic ratio of absolute or dynamic viscosity to density a quantity in which no force is involved obtained by dividing the absolute viscosity of a fluid with it's mass density

Kinematic:

Kinematic v = ɳ / ρ where: v = kinematic viscosity Ρ = density

Viscosity:

Viscosity 2 factors: Intermolecular forces of attraction (strong bonds = high viscosity) Temperature (high temp = low viscosity) Pressure (high pressure = high viscosity) Velocity (high velocity = low viscosity)

Viscosity:

Viscosity Other factors: Size of molecules (bigger molecules, high viscosity) Shape of molecules (oval and disk-like molecules, high viscosity) Note: not generally applicable

Ostwald Viscometer:

Ostwald Viscometer

Poiseuille Equation:

Poiseuille Equation

PowerPoint Presentation:

Methodology

methodology:

methodology clean viscometer with chromic acid sol’n , soap and distilled water 5.0 mL distilled water into viscometer Water bath (15 mines)

methodology:

le methodology measure as liquid flows from upper to lower mark