Honey and water are miscible fluids, that it, fluids that dissolve comletely in each other. Water will be injected into honey to test if it will act like an immiscible fluid, such as water being injected into oil, and spontaneously form a spherical drop. The experiment needs to be performed in weightlessness.Principal Investigator(s)
Marshall Space Flight Center, Huntsville, AL, United States
National Aeronautics and Space Administration (NASA)Sponsoring Organization
National Laboratory (NL)Research Benefits
Information PendingISS Expedition Duration:
October 2003 - September 2012Expeditions Assigned
8,9,10,11,29/30,31/32Previous ISS Missions
A related experiment was flown 4 times on a KC-135 aircraft.
The goal of MFMG id to determine if interfacial phenomena seen with immiscible fluids can be seen with miscible fluids. The experiments will be performed with existing materials on the ISS. Honey and water were chosen as the fluids, and urine collection syringes will be used as the vessels in which the experiment will be performed. A blob of dyed water will be injected into honey. The drop of water will be imaged for several hours to determine if the water assumes a spherical shape as would be observed for immiscible fluids.
If we show that convection can be caused by an effective interfacial tension between miscible fluids, then this fact may be important for materials processing and fluid handling in weightlessness.Earth Applications
The experiment may have relevance to microfluidics.
The water must be injected into the honey without air bubbles. The digital images will be the only data from the expeirment. No realtime downlink is required nor return of samples.Operational Protocols
A blob of dyed water will be injected into honey. The drop of water will be imaged for several hours to determine if the water assumes a spherical shape as would be observed for immiscible fluids.
Miscible Fluids in Microgravity (MFMG) was a zero-upmass investigation performed on the International Space Station. The goal of MFMG was to determine if interfacial phenomena seen with immiscible fluids could be seen with miscible fluids. The experiments had to be performed with existing materials on the ISS. Honey and water were chosen as the fluids, and urine collection syringes were used as the vessels in which the experiments were performed. In March 2004 (Increment 8) Dr. Michael Foale performed four experiments under isothermal conditions to determine: If a stream of honey injected into water would exhibit the Rayleigh-Tomotika instability and break into small drops. If an aspherical drop of water in honey would spontaneously assume a spherical shape. The experiments were performed successfully. During Increment 9, Mike Fincke performed two runs in which a stream of honey was injected into water while the syringe was attached to the surface of the Commercial Generic Bioprocessing Apparatus (CGBA) at approximately 31 ęC. No change in the stream shape was observed. Two more runs were performed on Increments 10 and 11 but no additional phenomena were observed. No behavior beyond simple diffusion was observed. We performed simulations with the Navier-Stokes equations plus a Korteweg stress term. We estimated that the maximum possible value of the square gradient parameter was 10?12 N for the honey-water system.
Pojman JA, Bessonov N, Volpert V, Paley MS. Miscible Fluids in Microgravity (MFMG): A Zero-Upmass Experiment on the International Space Station. 43rd Aerospace Sciences Meeting and Exhibit, Reno, NV; 2005 Jan 10 - 13
Volpert V, Pojman JA, Texier-Picard R. Convection Induced by Composition Gradients in Miscible Systems. Comptes rendus de l'Academie des sciences Mecanique. 2002; 330: 353-358.
Bessonov N, Volpert V, Pojman JA, Zoltowski BD. Numerical Simulations of Convection Induced by Korteweg Streses in Miscible Polymer-Monomer Systems. Microgravity Science and Technology. 2005; 17(1).
Bessonov N, Pojman JA, Volpert V. Modelling of Diffuse Interfaces with Temperature Gradients. Journal of Engineering Mathematics. 2004; 49: 321-338.