# Definitions for ram pressureram pres·sure

### WikipediaRate this definition:0.0 / 0 votes

1. Ram pressure

Ram pressure is a pressure exerted on a body moving through a fluid medium, caused by relative bulk motion of the fluid rather than random thermal motion. It causes a drag force to be exerted on the body. Ram pressure is given in tensor form as P ram = ρ u i u j {\displaystyle P_{\text{ram}}=\rho u_{i}u_{j}} ,where ρ {\displaystyle \rho } is the density of the fluid; P ram {\displaystyle P_{\text{ram}}} is the momentum flux per second in the i {\displaystyle i} direction through a surface with normal in the j {\displaystyle j} direction. u i , u j {\displaystyle u_{i},u_{j}} are the components of the fluid velocity in these directions. The total Cauchy stress tensor σ i j {\displaystyle \sigma _{ij}} is the sum of this ram pressure and the isotropic thermal pressure (in the absence of viscosity). In the simple case when the relative velocity is normal to the surface, and momentum is fully transferred to the object, the ram pressure becomes P ram = ρ u 2 {\displaystyle P_{\text{ram}}=\rho u^{2}} .

### WikidataRate this definition:2.8 / 4 votes

1. Ram pressure

In physics, ram pressure is a pressure exerted on a body that is moving through a fluid medium. It causes a strong drag force to be exerted on the body. It is given by: where is the pressure, is the density of the fluid and the relative velocity between the body and the fluid. For example, a meteor traveling through Earth's atmosphere produces a shock wave generated by the extremely rapid compression of air in front of the meteoroid. It is primarily this ram pressure that heats the air that in turn heats the meteoroid as it flows around it. Galaxies in clusters experience ram pressure as they move through the intracluster medium; it is capable of stripping the galaxy of much of its interstellar gas.

### Numerology

1. Chaldean Numerology

The numerical value of ram pressure in Chaldean Numerology is: 5

2. Pythagorean Numerology

The numerical value of ram pressure in Pythagorean Numerology is: 9

## Translations for ram pressure

### From our Multilingual Translation Dictionary

• Staudruck
• presión de ram
• la pression dynamique
• राम दबाव
• nyomást
• tekanan ram
• pressione ram
• ram druk
• ciśnienie RAM
• ramtryck
• ram basıncı

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"ram pressure." Definitions.net. STANDS4 LLC, 2024. Web. 9 Sep. 2024. <https://www.definitions.net/definition/ram+pressure>.

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A famish
B scarper
C abide
D efface