Magnetic Field and Water Electrolysis Work

In summary, the equations for the internal energy of water electrolysis in a magnetic field are found in a paper titled "Magnetohydrodynamic Propulsion for the Classroom" - Suter et al. 2009. The paper states "This leads to the statement for the force imparted on a current in the presence of a magnetic field", which redefines the equation for force as F = LI x B, with B as the magnetic field.
  • #1
HelloCthulhu
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3
Greetings everyone!

I recently read a research paper on the effects of a magnetic field on redox potential of water (Magnetic Field Effects on Redox Potential of Reduction and Oxidation Agents), but the paper didn't include any of the equations related to the internal energy of the system.

Another paper (Magnetohydrodynamic Propulsion for the Classroom) stated magnetohydrodynamic (MHD) force (on water) as F = qv x B, where qv = (qnAL)v. The n is the number of charges per volume and A and L are the cross-sectional area and length of the channel or container. The quantity qnAv will define the current I. The paper stated "This leads to the statement for the force imparted on a current in the presence of a magnetic field", which redefines the equation for force as F = LI x B, with B as the magnetic field.

The work for the electrolysis of water is calculated as W = PΔV. Considering the listed equations, is there an equation to calculate the work done to the system within a magnetic field? Any help is greatly appreciated.
 
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  • #2
I'm sorry you are not finding help at the moment. Is there any additional information you can share with us?
 
  • #3
Thank you for responding Greg!

I'm trying to find an equation to calculate the change in internal energy for water electrolysis within a magnetic field perpendicular to the current; magnetohydrodynamics (MHD). The cross products of current I and magnetic field B generates a force F perpendicular to the magnetic field; Lorentz Force. Considering that the equation for the system work of water electrolysis is W = PΔV, how would I rewrite this equation to include a magentic field perpedicular to the current?

I've uploaded 12 pages from the research paper "MHD Propulsion" - Sutcliffe & Neiser 2009. It includes an example of the equation for MHD thrust: F = IL X B. Any help is greatly appreciated.
 

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  • #4
Magnetohydrodynamics, Internal Energy, and System Work

Update

I've only found 1 paper with equations for the internal energy: "Magnetohydrodynamic Electrochemistry in the Field of Nd−Fe−B Magnets. Theory, Experiment, and Application in Self-Powered Flow Delivery Systems" - Leventis & Gao 2001. I found it very confusing. I'll post the 3 pages that have the formulas. Any help is greatly appreciated.
 

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  • #5


Hello there,

Thank you for sharing your research and questions with us. It is always exciting to see new developments and studies in the field of magnetism and water electrolysis.

Regarding your first point, it is not uncommon for research papers to not include all equations related to a study. Often, researchers focus on specific aspects of a phenomenon and may not include all equations in their paper. However, there may be other papers or sources that discuss the equations you are looking for.

As for the second paper you mentioned, the equation F = qv x B is a simplified version of the full equation for MHD force, which takes into account the current and the magnetic field. This equation is often used in introductory explanations and may not be applicable in all cases. The equation F = LI x B is a more accurate representation of the force exerted on a current in the presence of a magnetic field.

In terms of calculating the work done in a system within a magnetic field, there are various equations that can be used, depending on the specific setup and conditions. One possible equation is W = ∫Fdx, which calculates the work done by a force over a certain distance. However, this may not be the most appropriate equation for your specific case. It would be best to consult with a specialist or refer to other research papers for a more accurate calculation.

I hope this helps. Keep up the good work in your research!
 

1. How does a magnetic field affect water electrolysis?

A magnetic field can increase the rate of water electrolysis by causing the charged particles in the water to move more quickly and efficiently. This can result in a more efficient separation of hydrogen and oxygen gas, leading to a higher production of hydrogen gas.

2. Can a magnetic field change the products of water electrolysis?

No, a magnetic field does not change the chemical reaction that occurs during water electrolysis. It only affects the movement of the charged particles, resulting in a faster and more efficient reaction.

3. What is the role of a magnetic field in water electrolysis?

The role of a magnetic field in water electrolysis is to increase the rate of the reaction by influencing the movement of charged particles. This can lead to a more efficient separation of hydrogen and oxygen gas, ultimately resulting in a higher production of hydrogen gas.

4. Can any magnetic field be used for water electrolysis?

Yes, any magnetic field can be used for water electrolysis as long as it is strong enough to influence the movement of charged particles. However, the strength and direction of the magnetic field can affect the efficiency of the reaction.

5. Is water electrolysis with a magnetic field a sustainable method of producing hydrogen gas?

Yes, water electrolysis with a magnetic field can be a sustainable method of producing hydrogen gas as it does not require any external energy sources and only uses water as the raw material. However, the efficiency of the reaction and the sustainability of the magnetic field source must be considered.

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