Flow (stylized as flOw) is an independent video game created by Jenova Chen and Nicholas Clark. Originally released as a free Flash game in 2006 to accompany Chen's master's thesis, it was reworked into a 2007 PlayStation 3 game by his development studio, Thatgamecompany. SuperVillain Studios developed a PlayStation Portable version of the game in 2008, and PlayStation 4 and PlayStation Vita versions in 2013. In Flow, the player navigates a series of two-dimensional (2D) planes with an aquatic microorganism that evolves by consuming other microorganisms. The game's design is based on Chen's research into dynamic difficulty adjustment at the University of Southern California's Interactive Media Division, and on psychologist Mihaly Csikszentmihalyi's theoretical concept of mental immersion or flow.
The Flash version of Flow received 100,000 downloads within its first two weeks of release, and had been played over 3.5 million times by 2008. Its PlayStation 3 re-release was the most downloaded game on the PlayStation Network in 2007 and won the Best Downloadable Game award at the 2008 Game Developers Choice Awards. It was nominated for awards by the Academy of Interactive Arts & Sciences and the British Academy of Film and Television Arts (BAFTA). Reviewers praised Flow's visual and audio appeal, but noted the simplicity of its gameplay; several considered it to be more of an art piece than a game.
I am looking at evaporating droplets and I am interested in looking at when there is azimuthal symmetry, and I need to write the Navier-Stokes equations for this. I just set all \varphi terms in the spherical case equal to zero right?
I'm doing a little project of mine and am currently trying to figure out if my machine(being built) would work how i want it to work.
So i have a tube that goes in a full circle, this tube has 2 hand cranked turbines that give the water its initial motion to go round and round. Theres little...
Homework Statement
Consider an aircraft turbine as in the figure below. In the reference frame of the turbine, air of density ##\rho_0## comes into the turbine with speed ##U_0## through the entrance with cross sectional area ##S_0##. In the combustion zone, air is mixed with the fuel and...
I'd like to use 2-d for simplification.
Divergence is the rate of change of a component of a field F as you travel along that component's direction.
So Fx represents the part of F flowing the X direction and same with Fy along the Y direction, and so divergence is calculated by dFx/dx +...
Homework Statement
When a part of the channel is constricted , why will the Emin = Eo ? Homework EquationsThe Attempt at a Solution
I just have the figure showing in case 1 and case 2, Emin = Eo without any explanation ... Can someone explain about it ? I tried to search many online resource ...
There's been a discussion going on since this following thread: Range of frequency of electromagnetic wave how electric current flow through a conductor. I need a proper clarity, does the electrons literally displace and flow or just the disturbance/energy travel through conductor making...
Homework Statement
q = -kdp/dx
Homework Equations
q = heat flow
k = constant
p = thermal energy density
The Attempt at a Solution
This equation says that when heat flows from hot to cold the thermal energy density increases but why? I thought heat meant a higher thermal energy density and hot...
Hello,
I'm having a question regarding the sensors and the techniques in fluid mechanics. Since my skills are amazing in this field, here I'm asking
you questions xD
I want to measure the air pressure of this tube/pipe (P1,P2,P3). This pipe will be flushed with water and then with compressed...
I have learned that diffusion/heat equation can be used to model groundwater flow in confined conditions. Recently I read a paper where they used linear Boussinesq equation (equation 1 in linked paper) to model groundwater flow in unconfined aquifer. Then in another paper, the auther said, he is...
Homework Statement
The Attempt at a Solution
Top left: No charge flowing through circuit b/c switch is open, not closed.
Top right: No charge flowing through circuit b/c circuit does not connect positive and negative terminals
Bottom left: Charge flows through circuit b/c closed loop between...
Homework Statement
Question attached:
Homework Equations
see below
The Attempt at a Solution
- The theorem without prove i require needed is that the cut of maximum flow is given by the cut of minimal capacity.
My proof would be along the lines of:
- using this theorem, obviously 100 is a...
I would like to ask about the difference between the simple compressible system and the flow systems.
"In the absence of such effects as magnetic, electric, and surface tension, a system is called a simple compressible system. The total energy of a simple compressible system consists of three...
I am trying to calculate the flow in a system from an underground tank up through a pump into a vessel.
But cannot find or derive a formula that yields a good result, I don't think I can use the same head calculations as Velocity will have changed.
1. Homework Statement
ρ = 1000 kg m–3
μ =...
Homework Statement
An Aluminium rod has a diameter of 40mm. and is 750mm long. If the temperature difference between the ends of the rod is 100C .
Take the thermal conductivity of Aluminium to be 235 Wm-1K-1
Homework Equations
k * A * ΔT / L
The Attempt at a Solution
235 * 0.097 m * 100 /...
Homework Statement
A tank with a 25.5 litre capacity contains air compressed into 355 atmospheres used to drive a torpedo by expansion into an engine via a pipe of diameter 0.08cm. A mechanism ensures that the gas flows to the engine at a constant rate and any cooling of the air during...
I encountered this statement on my lecture notes today,
I don't understand why compressible flow needs to have another constraint of energy equation while incompressible flow only satisfies continuity and momentum equation. And how is this energy equation related to the speed of sound?
Can someone explain what it means for a fluid flow to be reversible and how this relates to Reynolds number, both intuitively and mathematically?
Thanks!
Homework Statement
A fireman's hose acting as a water cannon, directs 100 litres/s (100 kg/s) of water horizontally at your chest at speed 5 ms-1. Assuming water essentially falls to the ground after hitting your chest (rather than say reflecting horizontally backwards), what horizontal force...
Hi.
I fear I might not have understood some fundamental concepts about electric power transmission. So we have "neutral" which is brought to Earth potential. Does this mean the electrical circuit from the power plant over highly conductive aluminium cables to my home closes back to the power...
So I was playing around with Fluid Pressure and Flow over on PHET animations and noticed something odd. When a fluid with high flow rate is going from a large pipe to a small pipe a lower density increases the pressure. And a higher density lowers the pressure in the narrow part of the pipe. My...
Consider a small rigid spherical particle of radius a, fully immersed in a viscous incompressible Newtonian fluid of shear viscosity η above a hard-wall with stick (no-slip) boundary conditions, located at the plane z = 0. A constant positive (external) torque Tx is applied on the particle.
My...
Hello, I am building a small car that upon hitting a wall will go backwards, in other words reverse the current flow. I have all the components requiered (resistors 3k and 1k, wires, 6V battery, and an H-bridge, locking button) only thing I do not know is how to connect them all together. If...
Hello,
I am doing a project which includes attempting to map a theoretical pressure distribution across a capillary tube. I am trying to do a finite element analysis using Hagen-Poiseuille's Law to map the theoretical pressure distribution before I move onto using a SolidWorks Flow Simulation...
Homework Statement
This problem belongs to the Intermediate Physics for Medicine and Biology, Hobbie Chapter 4.
The heat flow equation in one dimension
$$ j_H=-\kappa \partial_x T $$
where ## \kappa ## is the termal conductivity in ## Wm^{-1}K^{-1}##. One often finds an equation for the...
looking at where to start understanding how the thrust/lift generated by a specific propeller (hypothetical one) changes as a function of surrounding air pressure.
obviously the lift will go to zero as air pressure decreases.
as pressure increases, modeled by say mounting the propeller inside...
Would lightning work in space? I think it would but you wouldn't be able to see it?
Let's say I have some sort of device that creates a lightning bolt, if I shot it at a watermelon in a vacuum or another target would it hit the target, or nothing happen because of the vacuum?
Hi PF!
Can someone help me understand how to draw lines of constant pressure in an inviscid flow field, say flow around a cylinder. I am having trouble understanding how to draw these. Any help is greatly appreciated!
I ask this question because I am preparing for the Q exam for PhD and one of...
If I have a 1/2" source hose with 60PSI and a Flow sensor then split to four 3/8" hoses with a flow rate limited to 30SCFH. Should I expect to have a 120SCFH flow rate across my flow sensor? The gas will be 90% Argon/10%CO2, but we could assume an Ideal Gas for this... Right? I understand...
Hello,
How do you calculate the terminal velocity of a fluid through a pipe.
My problem includes turbulent flow, very high reynold number, and water (incompresible).
I'm trying to figure out how to best filter some liquids. A 5 gal bucket is filled with some filter medium (say sand on top 1/2 and fine charcoal on bottom 1/2). The liquid is slowly added at the top and gravity is used and vacuum may be used at some point with a complete seal along the bottom...
I am new to COMSOL and I want to model fluid flow in stress field. As starting point I want a simple 2D box having a fracture from right to left while pressure gradient vertically. I want to know the threshold value of that pressure from top which allows flow of fluid in fracture. Can anyone...
I got two flow lines at 90 degree angle, Line A carrying acid and line B carrying water, each with 1 inch diameter, merging at point P. The third line C beginning at point P, also 1" diameter, should carry 90% water and 10% acid. I came up with option 1 but not sure how to achieve the same using...
A water tub has 3 water channels. Channel I and II for filling the tub and channel III to empty it. Those 3 channels together fulfill the tub for 1 hour and 20 minutes. Channel I and II together fulfill the tub for 1 hour and 12 minutes from the empty condition. Channel II and III together...
Hi all,
It has come to my attention this article on PF (https://www.physicsforums.com/insights/can-gene-editing-eliminate-alzheimers-disease/) about a genetic approach to prevent Alzheimer's disease, based on applying gene-editing techniques on human embryos. In short (so not to be...
Hello, I'm a physician with special interest in cardiovascular physiology. I'm trying to comprehend the basic physics of the cardiovascular system. Here's my thought process -
Simply stated - the heart muscle contracts, thereby causing a reduction in the cardiac chamber volume and release of...
Why is the pressure used in flow work the pressure of the fluid? If the fluid was say at 10kPa and the external pressure was at 0Pa, why don't we use the 0Pa in our calculations for flow work, since it's the external pressure that's the resistance? Or is it not possible to have this difference...
I'd like to experimentally simulate air flow turbulences around obstacles. Building the obstacles in one thing, but providing a well characterised flow (and mix it with something visible like smoke...) is something else. In general, I think the whole idea is easier to acomplish compared to fluid...
Hi PF!
Some classmates and I were talking about the streamlines around a submerged cone being pulled at a velocity ##V##. The picture is attached. Can someone shed some light on the streamlines of this flow, assuming it is inviscid? I take a frame of reference that moves with the cone...
Hi PF!
I was recently looking at two immiscible fluids in a 2-D Poiseuille Flow with two immiscible fluids of different densities. Let the total distance of the channel be ##L+\epsilon L##, where the dividing line between the two flows is ##L##. I was thinking of the possible flow profiles and...
Hi
When I was writting my thesis I found in an article, published in International Journal of Heat and Mass Transfer, an unit of mass flow rate G - kg/(m^2*s). Isn´t it wrong? I think that the unit of mass flow rate is kg/s. Would you mind helping me to figure it out? Thanks.
So, a coworker approached me today with a 'simple problem' to solve, looking to sanity-check a design choice.
Much to my dismay, I had no idea how to approach it. Worse, google had no straight-forward answers either, and any formulae I did find seemed circular.
This seems too simple to...
In the case of a kidney vessel from point a to point b(a-------------b), say we constrict point b and increase resistance. Would the flow rate be decreased before the constriction at b, or would the flow rate only be changed after the constriction.
Thank you Physicsforums!
Hi,
I recently came across a blog on schlieren visualization (http://ottobelden.blogspot.in/2010/07/homemade-schlieren-photography-setup.html).
I replicated it with the following: Convex lens (130 mm dia and 350 mm focal length), LED light source (5 mm white LED) and smartphone camera (Moto G4...
As I understand it, there is no solid definition of time other than the entropy is an arrow of time flow. I believe that physics equation would work regardless of the direction of time flow. What would be the implications if we assume that past, present, and future events are part of the...
The momentum-space fermion propagator in the free Dirac theory is given by
The arrow on the fermion propagator is said to represent the flow of charge.
How can we derive this statement quantitatively from the Dirac Lagrangian?
What is the quantitative form of the charge being referred to here?