Ultrasonic Parameters as a Function of Absolute Hydrostatic Pressure. II. Mathematical Models of the Speed of Sound in Organic Liquids

2003 ◽  
Vol 32 (4) ◽  
pp. 1535-1544 ◽  
Author(s):  
Barbara A. Oakley ◽  
Darrin Hanna ◽  
Meir Shillor ◽  
Gary Barber
Keyword(s):  
Hydrostatic Pressure ◽  
Mathematical Models ◽  
Speed Of Sound ◽  
Organic Liquids ◽  
Ultrasonic Parameters

Density, Viscosity, Refractive Index, and Speed of Sound for Binary Mixtures of 1,4-Dioxane with Different Organic Liquids at (298.15, 303.15, and 308.15) K

2005 ◽  
Vol 50 (3) ◽  
pp. 917-923 ◽  
Author(s):  
Jagadish G. Baragi ◽  
Mrityunjaya I. Aralaguppi ◽  
Tejraj M. Aminabhavi ◽  
Mahadevappa Y. Kariduraganavar ◽  
Shrikant S. Kulkarni
Keyword(s):  
Refractive Index ◽  
Binary Mixtures ◽  
Speed Of Sound ◽  
Organic Liquids

A Consideration on the Behavior of Hydraulic Pressure Ripples in Relation to Hydraulic Oil Temperature

2015 ◽  
Author(s):  
Shuichi Nakagawa ◽  
Takayoshi Ichiyanagi ◽  
Takao Nishiumi
Keyword(s):  
Thermal Properties ◽  
Physical Properties ◽  
Mathematical Models ◽  
Bulk Modulus ◽  
Temperature Change ◽  
Speed Of Sound ◽  
Thermal Characteristics ◽  
Hydraulic Pressure ◽  
Hydraulic Oil ◽  
Pressure Ripples

It is well known that hydraulic noise can change as a system warms up. That change can be a factor for misperception of mechanical failure, because noise can play an important role as a signal that indicates abnormal operation. It is therefore important to understand the behavior of hydraulic pressure ripples that are a source of hydraulic noise in operating conditions, and how they change in relation to the temperature of the hydraulic oil. This study has investigated the ripple behavior that results from temperature change in simple hydraulic systems, using mathematical models that took thermal properties into account. Physical properties of the oil and the speed of sound in the oil have been defined as temperature-related variables in the mathematical models. The physical properties that should be used in the mathematical models have been obtained directly from the oil manufacturer. In contrast, the speed of sound in the oil has to be obtained from the isentropic tangent bulk modulus of the oil in an actual operating condition. That has been determined from the specific volume ratio of entrained air to the oil and the isentropic tangent bulk modulus of the only oil. The thermal properties of the speed of sound in the oil have been determined from the thermal characteristics of these variables, and it has been found that the speed of sound in the oil decreases with a rise in the oil temperature. The mathematical models of pressure ripples have shown that there were three distinct phenomena resulting from the temperature change of the oil. The first is the change of wavelength. The second is the spatial dependence of the thermal characteristics of the pressure ripples. The third is the difference of the thermal characteristics of the pressure amplitude at the peak in spatial modes. These changes that result from the temperature variation tend to be large at higher frequency.

Response to “Oil-Based Gel Phantoms and the Speed of Sound”

2020 ◽  
Vol 46 (11) ◽  
pp. 3172
Author(s):  
Natasha Alves ◽  
Brian K. Courtney
Keyword(s):  
Speed Of Sound

Handbook of Mathematical Models for Languages and Computation

2019 ◽  
Author(s):  
Alexander Meduna ◽  
Petr Horacek ◽  
Martin Tomko
Keyword(s):  
Mathematical Models

The Hydrostatic Pressure Effect on Elastic Properties of B2-Phase Single Crystals Ti50Ni48Fe2and Ti50Ni45Fe5Alloys

1995 ◽  
Vol 05 (C8) ◽  
pp. C8-729-C8-734
Author(s):  
A.I. Lotkov ◽  
V.P. Lapshin ◽  
V.A. Goncharova ◽  
H.V Chernysheva ◽  
V.N. Grishkov ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Single Crystals ◽  
Elastic Properties ◽  
Pressure Effect ◽  
B2 Phase
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