28 Is it possible to "pump" a powder? 2015-01-20T18:35:59.493

23 Is it possible to build an air compressor with no moving parts? 2015-05-14T16:46:46.883

19 How to know whether the flow is supersonic in a nozzle? 2015-01-26T17:56:37.703

19 Windmills in empty fields. Why no trees? 2016-11-23T12:51:59.090

14 What is the physical interpretation of the second term in the viscous stress tensor in the Navier-Stokes equations? 2015-04-12T18:09:56.273

13 Why is Mach 0.3 the threshold separating compressible and incompressible flow? 2016-02-09T16:13:55.363

12 How long does it take for dust to settle out of the air? 2015-05-06T20:51:48.677

12 Exploiting fluid dynamics for the optimal design for gas mixing in a furnace 2015-05-08T21:06:35.387

12 How to stop water flow in a siphon? 2016-04-27T18:13:24.710

11 Which turbulence models are suitable for CFD analysis on a streamlined vehicle body? 2015-01-28T19:27:50.297

11 What makes the material travel through Archimedes' Screw? 2015-03-04T19:50:21.837

11 How is lift related to airspeed? 2015-06-02T17:38:46.190

10 What is the meaning of vorticity and circulation? 2015-07-05T13:50:10.037

9 How do the bubble oscillations in two-phase flows affect the dissipation rate of turbulent kinetic energy? 2015-08-20T09:37:57.970

9 Would an object at the bottom of the sea still experience buoyancy? 2018-01-30T06:35:16.100

8 Can you use the Hagen-Poiseuille equation for a pipe which radius is in the sub-millimeter region? 2015-01-26T12:03:23.730

8 How is gas flow through (extremely long) pipelines monitored and controlled? 2015-01-27T16:23:35.050

8 Estimating Darcy Friction Factors for Critical Flow 2015-08-18T13:24:24.987

8 How to determine the characteristic length in reynolds number calculations in general? 2015-10-09T22:26:00.267

8 Why does filter efficiency decrease with thickness? 2015-11-06T14:37:13.633

8 Why can we neglect the inertial (but not viscous) term in Navier-Stokes at low flow and high viscosity? 2015-11-25T11:30:12.900

7 Force required to empty a syringe 2015-03-11T19:39:51.347

7 One large fireplace flue versus two smaller ones 2015-04-26T22:49:10.877

7 Hydraulic siphon spillway entry and exit velocity magnitude and profiles 2015-08-18T14:19:33.700

7 How do I select an appropriate turbulence model? 2015-10-14T18:34:18.793

7 Ways to reduce turbulence in internal flows 2015-10-28T22:41:37.783

7 What makes something like water so hard to change its density? 2016-06-30T21:16:05.197

7 What fundamentally distinguishes cavitation and boiling as different phenomena? 2016-10-22T23:55:50.420

7 Multiphase Flow - Energy Coupling Parameter 2017-03-17T10:58:26.410

6 Low cost, moderately accurate water depth measurement 2015-05-17T00:38:37.407

6 What is "flow instability" in porous media? 2015-07-18T14:44:59.970

6 What is the Boussinesq approach? 2015-09-14T21:09:45.450

6 Is inviscid flow necessarily turbulent? 2015-10-07T22:32:50.567

6 How to design the most hydro/aerodynamic shape for a 'vehicle' that goes back and forth (using ANSYS)? 2016-01-14T13:17:04.980

6 Dynamic mass balance in plug flow reactor 2016-01-26T11:39:48.250

6 Is it possible to replicate a Tesla valve in large scale? 2016-02-09T15:18:26.673

6 How to calculate flow rate of water through a pipe? 2016-03-17T09:27:41.590

6 Working Out Shaft Torque in a Stirred Tank with a Cylindrical Cavern Formation (using a non Newtonian fluid) 2016-04-02T18:34:07.813

6 Deriving the turbulent kinetic energy equation 2016-04-04T22:05:14.957

6 Force Balance Question 2016-04-22T14:25:04.783

6 Thermodynamics of gas exchange between gas cylinders 2016-04-29T14:00:09.510

6 Do all airfoils have a lift curve slope of $2\pi$? 2017-01-02T23:16:05.640

5 Determining pressures of a compressible gas 2015-01-26T20:33:45.380

5 Hovercraft design parameters 2015-03-28T15:44:22.360

5 controlled depositing of goo with a syringe 2015-04-09T17:46:10.807

5 Physical interpretation of the relative displacement tensor? 2015-04-28T04:19:26.107

5 Why is my Venturi pump much weaker than expected? 2015-05-07T15:58:10.183

5 Minimising permeation rate of hydraulic fluid through hydraulic hose 2015-05-15T15:54:24.930

5 Can a boiler feedwater injector be used to compress air? 2015-05-16T10:50:44.230

5 Pressure drop due to mass loss 2015-06-30T20:29:08.570

5 Bond number for accelerating flow 2015-07-02T12:19:03.220

5 How does the pressurized suspension of the Hyperloop not affect the tube pressure? 2015-07-02T12:43:50.503

5 How do I calculate the max flow rate for a pump with no power restrictions? 2015-07-07T14:27:23.230

5 What will happen if I run a submersible pump without water? 2015-07-19T11:39:14.037

5 efficiency and flow separation 2015-09-11T12:29:10.627

5 Residuals of continuity not converging 2015-09-12T22:28:32.547

5 Why does the standard $k-\epsilon$ model use zero equation models? 2015-09-23T17:32:43.037

5 What is a non-equilibrium boundary layer? 2015-10-12T15:08:35.613

5 Does opening a tap in a sink affect the radial speed of the water around the jet? 2015-11-17T04:19:21.503

5 Diesel Cycle Vs. Otto cycle 2015-11-17T20:15:17.593

5 How long does it take for two initially seperate fluids to reach a certain homogenity across their container? 2015-12-05T08:34:16.103

5 How to 'smooth/flatten' the surface of a disturbed liquid without contacting it? 2015-12-27T01:57:30.460

5 Shear rate of a fluid in a container with a sliding PTFE top plate. Will the liquid move with the plate? 2016-02-05T01:08:42.373

5 Normalization and Non-Dimensionalization of a mass balance equation 2016-04-07T09:31:01.547

5 Why do parallel fans/blowers show an oscillatory behavior? 2016-04-20T15:02:14.247

5 Incompressible 2D pressure-driven flow: for Navier-Stokes equations in nondimensional form, how should I express pressure boundary conditions? 2016-04-24T20:37:59.007

5 How can I translate a pressure boundary condition to a velocity boundary condition for incompressible, viscous flow? 2016-04-27T20:22:54.610

5 Viscosity of select species at atmospheric pressure for very large temperatures? 2016-05-08T10:23:14.167

5 How do gas flow regulators avoid choking? 2016-06-04T16:22:06.553

5 Should I expect fluid velocity within a pipe to increase beyond the inlet velocity? 2016-07-11T20:15:05.267

5 How to measure turbulence parameters experimentally? 2016-07-23T21:16:13.737

5 How do I find the impact pressure of cavitation due to implosion of a super critical fluid bubble? 2016-10-12T20:27:33.083

5 What is this contraption? 2017-03-25T15:04:54.873

5 Why does flow seperation cause low pressure zone? 2017-03-26T13:58:37.463

5 Is radians dimensionless quantity? 2017-08-09T06:04:44.057

5 Buoyancy force problem 2017-12-22T13:13:24.910

5 How Can I Determine Multiple Discharges from a Pipe Network? (Knowing the Inlet Conditions) 2018-01-11T09:34:56.407

5 How to calculate the pressure loading of a vented silo explosion? 2018-01-23T20:13:07.880

5 Von Karman mixing length $l=k \frac{du/dy}{d^2u/dy^2}$ 2018-02-27T06:46:39.810

4 For a small valve in a fluid system, what is the relationship between pressure and flow rate? 2015-01-28T22:00:19.550

4 Upper bound for von Karman Vortex Street? 2015-03-08T22:13:45.600

4 Output pressure of centrifugal pump 2015-05-12T11:45:01.943

4 Solenoid valve pressure drop 2015-05-16T00:42:28.253

4 What does 'Open Flow' mean for a pump flow rate? 2015-06-15T10:35:18.380

4 DIY Waterwheel which generates 100 W? 2015-06-17T09:38:23.630

4 Calculating pressure force on inclined area 2015-07-15T17:42:40.840

4 Precision measurement of liquid levels 2015-08-10T13:47:52.457

4 Perfectly aerodynamic kitchen range hood 2015-09-09T08:08:40.533

4 Equating $\frac{dp}{dt}$ and $F$ at a hydraulic jump? 2015-09-21T11:22:14.297

4 How to size a fan for open air application? 2015-12-02T12:08:37.587

4 ∂p / ∂s ds Component in Euler's Fluids Equation 2015-12-17T08:04:17.747

4 What are these bent shapes on this elbow in a compressor suction pipe? 2016-02-25T03:36:22.737

4 How to increase the speed of exhaust gas? 2016-04-19T19:44:19.940

4 Nozzle Sac Pressure Estimation from flow rate 2016-05-06T13:57:10.940

4 Determine volume of liquid in a fluid bladder 2016-08-05T17:11:14.880

4 Torque converter torque multiplication 2016-11-06T14:17:36.253

4 Can cyclonic separators be used to separate heavier and lighter gases? 2016-12-28T17:33:45.707

4 Is there a pressure relief mechanism that operates faster than sound in a material? 2017-10-27T15:55:00.083

4 Flow through flattened tube 2018-02-12T05:51:37.043