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1.961 - Lecture 24 – Finding each other in the turbulent ocean

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Does turbulence help you encounter your prey or your mate? <br />External fertilization: encounter of...

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1.961 - Lecture 23 &#8211; Encounter models

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Encounter rate kernels<br /> Perception distance</p>

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1.961 - Lecture 22 &#8211; Particle capture

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>How do you capture prey at low Reynolds number ?</p><p>1) Hope it diffuses to you: Brownian...

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1.961 - Lecture 21 &#8211; Nutrient flux to osmotrophic organisms

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>The Sherwood number<br /> Increasing the nutrient flux: an exercise in thinning your boundary...

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1.961 - Lecture 20 &#8211; Diffusion to capture

<p><b>1.961 Life at low Reynolds numbers</b></p><p>Probability to capture and mean time to capture<br /> Adrift at sea: mixing plankton</p>

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1.961 - Lecture 19 - Flagellar propulsion

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Resistive force theory: exploiting the anisotropy of drag<br /> Optimum shape of flagella in 2D and...

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1.961 - Lecture 18 &#8211; Swimming at low Reynolds number

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Why and how to swim ?<br /> Eukaryotic flagella<br /> Prokaryotic flagella<br /> Little...

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1.961 - Lecture 17 &#8211; Hydrodynamic signals in the plankton

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p> The fundamental solution to Stokes' equation: the Stokeslet<br /> Other important solutions:...

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1.961 - Lecture 16 &#8211; Reorientation of organisms in a flow

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Organisms exposed to shear<br /> Jeffery orbits </p>

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1.961 - Lecture 15 &#8211; Drag and terminal velocity

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p> Stokes' settling speed<br /> Terminal velocity: on non-splashing mice<br /> Sinking and...

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1.961 - Lecture 14 &#8211; Stokes flow around a sphere

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Deriving the solution for the flow field <br />The drag force on the sphere<br /> Stokes' and...

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1.961 - Lecture 13 &#8211; The perils of reversibility

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Particles crossing streamlines?<br /> Solving hard problems without doing math<br /> The scallop...

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1.961 - Lecture 12 &#8211; Properties of Stokes flow

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Strouhal and Knudsen numbers <br /> A world with no inertia<br /> The instantaneous diffusion of...

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1.961 - Lecture 11 &#8211; Low Reynolds number fluid dynamics (Stokes flow)

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>When inertia doesn't matter: low Reynolds number<br /> Counterintuitive fluid mechanics (GI Taylor's...

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1.961 - Lecture 10 &#8211; Chemotaxis

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Many taxis: chemo-, photo-, pH-, magneto-, rheo-, geo-, aero-, thermo-, gyro-taxis. <br /> A computer...

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1.961 - Lecture 9 &#8211; Poisson processes and bacterial diffusion

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Tumbling intervals: a Poisson process<br />Diffusion of a bacterial population<br />Motility...

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1.961 - Lecture 8 &#8211; What&#8217;s diffusion got to do with...

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Brownian rotational diffusion<br /> A bacterial random walk: E. coli's run-and-tumble swimming<br...

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1.961 - Lecture 7 &#8211; Taylor dispersion

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>Poiseuille flow<br /> The advection-diffusion equation<br /> Stretching the mixing zone:...

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1.961 - Lecture 6 &#8211; Receptors

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p> Receptors on cell surfaces: how many do you need?<br /> Other forms of diffusion<br /> Diffusion...

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1.961 - Lecture 5 &#8211; Examples and applications of diffusion

<p><strong>1.961 Life at low Reynolds numbers</strong></p><p>The capillary assay: testing what microorganisms like<br /> Diffusion in a pipe<br /> Insect...

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