Dynamic Series – Hydrodynamics Part II The Laws

Hello again, beloved brethren, I hope this post finds you all doing well. If you’ll recall, in our series through dynamics, we’re on Hydrodynamics now. Today we’re going to discuss the laws of hydrodynamics. Isn’t it wonderful how God designed everything, put it all in motion, and upholds it minute by minute. Without this consistent obedience to Gods law, the blood flowing in our veins might cease, the waters running down our rivers could settle, life would stop. God truly has revealed Himself in His creation, we are all without excuse. What are these laws that literally keep our heart beating? The Laws of Conservation.

No, we’re not talking about reusing plastic. The Laws of Conservation of mass, energy, and linear momentum are the three laws used when referencing fluid dynamics. The conservation of mass is simply that mass can not be added or removed in a closed system. It’s the same law as matter not being created nor destroyed. Remember, dear ones, God finished His work on day 6, and rested on day 7. Nothing will be added to, or removed from, Gods work until Christ returns. In regards to Fluid Dynamics, Conservation of Mass has implications for movement through things such as ships in an ocean, or blood cells through veins. You can move the mass of fluid, you can put pressure on it to manipulate the flow, but you can not create fluid from nothing, nor can you destroy it.

The second law listed is the Conservation of Energy, most often called the first law of thermodynamics. I left thermodynamics last because, well one it’s my favorite, and two, it ties these all together. This Law states that energy can neither be created nor destroyed, like mass it just changes forms. Again, my friends, God rested on the 7th day from all His works. The last law mentioned is linear momentum, also known as Newton’s Second Law of Motion. This just states that the movement of a fluid is equal to the force applied. Our heart pumps our blood at a certain rate, rushing oxygen to the needed places. The movement is equal to the force.

Those are the three laws that Hydrodynamics follows, Conservation of Mass, Energy, and Linear Momentum. I can not stress enough to you, brethren, that our universe is orderly, not chaotic. From the planets orbits, to the microscopic atoms, everything does what it’s supposed to do. To look around at these laws, so beautifully and intelligently designed, and suggest that an explosion created them is genuinely repressing the truth in unrighteousness. I hope this series blesses you all, and glorifies the Creator by showing yet again that He truly is upholding all things. As always, dear friends, be good Berean’s and study to show yourselves approved.

Author: lnhereford

I am a Christian, wife, mother, podcaster and homeschooler currently traveling the United States with my loving husband and darling daughter!

6 thoughts on “Dynamic Series – Hydrodynamics Part II The Laws”

  1. Ugh…lady…have you ever taken a science class? I took Hydrodynamics in college for my environmental science degree and 2 years of Chemistry in high school (1 honors, 1 dual enrollment for college credit). Everything I’m writing here today is easily obtained with a few web searches.

    “You cannot create fluid from nothing, nor can you destroy it.” Ugh…where do we start? First, I guess let’s define a fluid: a substance that flows, so either a gas or liquid. A solid obviously wouldn’t flow.

    But, a fluid is an incredibly vague term! When you say a fluid cannot be created or destroyed, what does that even mean? Is it destroying a fluid when you freeze water into ice? Yes! Because you now have no more fluid (no more substance that can flow)! Yes, the ice is still H2O, but it’s no longer a fluid, therefore the fluid is destroyed until it’s created again through melting. Fluidity wasn’t conserved even as mass was.

    And you *can* destroy water through electrolysis! Apply electricity to water and it will cause it to break into it’s subsequent parts: 2H2O →2H2 + O2. Is it still a fluid? YES! At room temperature, H2 and O2 are gases, so you still have substances that flow and therefore you still have a fluid, but it’s no longer water! You now have two molecularly different chemicals than the water you started with, but fluidity is maintained…sort of. You see, the fluid dynamics of water are vastly different from the fluid dynamics of O2 and H2. Is it still a fluid? Yes. Is it the same fluid? No.

    Fluids are created and destroyed all the time!

    But, as I reread this, I see you’ve cleverly said that you can’t make a fluid out of nothing. True; fluids are composed of one or more parts and conservation of mass IS a Newtonian principle. But the conservation of mass has NOTHING to do with the conservation of fluidity except that regardless of if you are creating or destroying fluidity, mass stays the same!


    1. Good morning, Catherine! What a pleasant surprise to hear from you this early. I hope you’re doing well, and I appreciate your input on this. It looks like you answered your own question there at the end, so I don’t have much to say in response. I hope you’ll continue to follow this series, when we discuss the principles and applications the Conservation of Mass and it’s relationship to Hydrodynamics will probably be better explored. Although it’s truly a basic relation, as in much that Newton’s Laws tend to apply to. It does seem that things become more complex when you go further into the mechanics, but I don’t intend on delving too deeply into that. I look forward to hearing what you have to say!


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